diff --git a/bindings/bindings-linux-x86_64-R4.1.rs b/bindings/bindings-linux-x86_64-R4.1.rs
index b84d5b42..3ccfce81 100644
--- a/bindings/bindings-linux-x86_64-R4.1.rs
+++ b/bindings/bindings-linux-x86_64-R4.1.rs
@@ -5993,6 +5993,355 @@ extern "C" {
         arg4: SEXP,
     ) -> SEXP;
 }
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct R_altrep_class_t {
+    pub ptr: SEXP,
+}
+#[test]
+fn bindgen_test_layout_R_altrep_class_t() {
+    assert_eq!(
+        ::std::mem::size_of::<R_altrep_class_t>(),
+        8usize,
+        concat!("Size of: ", stringify!(R_altrep_class_t))
+    );
+    assert_eq!(
+        ::std::mem::align_of::<R_altrep_class_t>(),
+        8usize,
+        concat!("Alignment of ", stringify!(R_altrep_class_t))
+    );
+    assert_eq!(
+        unsafe { &(*(::std::ptr::null::<R_altrep_class_t>())).ptr as *const _ as usize },
+        0usize,
+        concat!(
+            "Offset of field: ",
+            stringify!(R_altrep_class_t),
+            "::",
+            stringify!(ptr)
+        )
+    );
+}
+extern "C" {
+    pub fn R_new_altrep(aclass: R_altrep_class_t, data1: SEXP, data2: SEXP) -> SEXP;
+}
+extern "C" {
+    pub fn R_make_altstring_class(
+        cname: *const ::std::os::raw::c_char,
+        pname: *const ::std::os::raw::c_char,
+        info: *mut DllInfo,
+    ) -> R_altrep_class_t;
+}
+extern "C" {
+    pub fn R_make_altinteger_class(
+        cname: *const ::std::os::raw::c_char,
+        pname: *const ::std::os::raw::c_char,
+        info: *mut DllInfo,
+    ) -> R_altrep_class_t;
+}
+extern "C" {
+    pub fn R_make_altreal_class(
+        cname: *const ::std::os::raw::c_char,
+        pname: *const ::std::os::raw::c_char,
+        info: *mut DllInfo,
+    ) -> R_altrep_class_t;
+}
+extern "C" {
+    pub fn R_make_altlogical_class(
+        cname: *const ::std::os::raw::c_char,
+        pname: *const ::std::os::raw::c_char,
+        info: *mut DllInfo,
+    ) -> R_altrep_class_t;
+}
+extern "C" {
+    pub fn R_make_altraw_class(
+        cname: *const ::std::os::raw::c_char,
+        pname: *const ::std::os::raw::c_char,
+        info: *mut DllInfo,
+    ) -> R_altrep_class_t;
+}
+extern "C" {
+    pub fn R_make_altcomplex_class(
+        cname: *const ::std::os::raw::c_char,
+        pname: *const ::std::os::raw::c_char,
+        info: *mut DllInfo,
+    ) -> R_altrep_class_t;
+}
+extern "C" {
+    pub fn R_altrep_inherits(x: SEXP, arg1: R_altrep_class_t) -> Rboolean;
+}
+pub type R_altrep_UnserializeEX_method_t = ::std::option::Option<
+    unsafe extern "C" fn(
+        arg1: SEXP,
+        arg2: SEXP,
+        arg3: SEXP,
+        arg4: ::std::os::raw::c_int,
+        arg5: ::std::os::raw::c_int,
+    ) -> SEXP,
+>;
+pub type R_altrep_Unserialize_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: SEXP) -> SEXP>;
+pub type R_altrep_Serialized_state_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP) -> SEXP>;
+pub type R_altrep_DuplicateEX_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: Rboolean) -> SEXP>;
+pub type R_altrep_Duplicate_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: Rboolean) -> SEXP>;
+pub type R_altrep_Coerce_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: ::std::os::raw::c_int) -> SEXP>;
+pub type R_altrep_Inspect_method_t = ::std::option::Option<
+    unsafe extern "C" fn(
+        arg1: SEXP,
+        arg2: ::std::os::raw::c_int,
+        arg3: ::std::os::raw::c_int,
+        arg4: ::std::os::raw::c_int,
+        arg5: ::std::option::Option<
+            unsafe extern "C" fn(
+                arg1: SEXP,
+                arg2: ::std::os::raw::c_int,
+                arg3: ::std::os::raw::c_int,
+                arg4: ::std::os::raw::c_int,
+            ),
+        >,
+    ) -> Rboolean,
+>;
+pub type R_altrep_Length_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP) -> R_xlen_t>;
+pub type R_altvec_Dataptr_method_t = ::std::option::Option<
+    unsafe extern "C" fn(arg1: SEXP, arg2: Rboolean) -> *mut ::std::os::raw::c_void,
+>;
+pub type R_altvec_Dataptr_or_null_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP) -> *const ::std::os::raw::c_void>;
+pub type R_altvec_Extract_subset_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: SEXP, arg3: SEXP) -> SEXP>;
+pub type R_altinteger_Elt_method_t = ::std::option::Option<
+    unsafe extern "C" fn(arg1: SEXP, arg2: R_xlen_t) -> ::std::os::raw::c_int,
+>;
+pub type R_altinteger_Get_region_method_t = ::std::option::Option<
+    unsafe extern "C" fn(
+        arg1: SEXP,
+        arg2: R_xlen_t,
+        arg3: R_xlen_t,
+        arg4: *mut ::std::os::raw::c_int,
+    ) -> R_xlen_t,
+>;
+pub type R_altinteger_Is_sorted_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP) -> ::std::os::raw::c_int>;
+pub type R_altinteger_No_NA_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP) -> ::std::os::raw::c_int>;
+pub type R_altinteger_Sum_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: Rboolean) -> SEXP>;
+pub type R_altinteger_Min_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: Rboolean) -> SEXP>;
+pub type R_altinteger_Max_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: Rboolean) -> SEXP>;
+pub type R_altreal_Elt_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: R_xlen_t) -> f64>;
+pub type R_altreal_Get_region_method_t = ::std::option::Option<
+    unsafe extern "C" fn(arg1: SEXP, arg2: R_xlen_t, arg3: R_xlen_t, arg4: *mut f64) -> R_xlen_t,
+>;
+pub type R_altreal_Is_sorted_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP) -> ::std::os::raw::c_int>;
+pub type R_altreal_No_NA_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP) -> ::std::os::raw::c_int>;
+pub type R_altreal_Sum_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: Rboolean) -> SEXP>;
+pub type R_altreal_Min_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: Rboolean) -> SEXP>;
+pub type R_altreal_Max_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: Rboolean) -> SEXP>;
+pub type R_altlogical_Elt_method_t = ::std::option::Option<
+    unsafe extern "C" fn(arg1: SEXP, arg2: R_xlen_t) -> ::std::os::raw::c_int,
+>;
+pub type R_altlogical_Get_region_method_t = ::std::option::Option<
+    unsafe extern "C" fn(
+        arg1: SEXP,
+        arg2: R_xlen_t,
+        arg3: R_xlen_t,
+        arg4: *mut ::std::os::raw::c_int,
+    ) -> R_xlen_t,
+>;
+pub type R_altlogical_Is_sorted_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP) -> ::std::os::raw::c_int>;
+pub type R_altlogical_No_NA_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP) -> ::std::os::raw::c_int>;
+pub type R_altlogical_Sum_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: Rboolean) -> SEXP>;
+pub type R_altraw_Elt_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: R_xlen_t) -> Rbyte>;
+pub type R_altraw_Get_region_method_t = ::std::option::Option<
+    unsafe extern "C" fn(arg1: SEXP, arg2: R_xlen_t, arg3: R_xlen_t, arg4: *mut Rbyte) -> R_xlen_t,
+>;
+pub type R_altcomplex_Elt_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: R_xlen_t) -> Rcomplex>;
+pub type R_altcomplex_Get_region_method_t = ::std::option::Option<
+    unsafe extern "C" fn(
+        arg1: SEXP,
+        arg2: R_xlen_t,
+        arg3: R_xlen_t,
+        arg4: *mut Rcomplex,
+    ) -> R_xlen_t,
+>;
+pub type R_altstring_Elt_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: R_xlen_t) -> SEXP>;
+pub type R_altstring_Set_elt_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP, arg2: R_xlen_t, arg3: SEXP)>;
+pub type R_altstring_Is_sorted_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP) -> ::std::os::raw::c_int>;
+pub type R_altstring_No_NA_method_t =
+    ::std::option::Option<unsafe extern "C" fn(arg1: SEXP) -> ::std::os::raw::c_int>;
+extern "C" {
+    pub fn R_set_altrep_UnserializeEX_method(
+        cls: R_altrep_class_t,
+        fun: R_altrep_UnserializeEX_method_t,
+    );
+}
+extern "C" {
+    pub fn R_set_altrep_Unserialize_method(
+        cls: R_altrep_class_t,
+        fun: R_altrep_Unserialize_method_t,
+    );
+}
+extern "C" {
+    pub fn R_set_altrep_Serialized_state_method(
+        cls: R_altrep_class_t,
+        fun: R_altrep_Serialized_state_method_t,
+    );
+}
+extern "C" {
+    pub fn R_set_altrep_DuplicateEX_method(
+        cls: R_altrep_class_t,
+        fun: R_altrep_DuplicateEX_method_t,
+    );
+}
+extern "C" {
+    pub fn R_set_altrep_Duplicate_method(cls: R_altrep_class_t, fun: R_altrep_Duplicate_method_t);
+}
+extern "C" {
+    pub fn R_set_altrep_Coerce_method(cls: R_altrep_class_t, fun: R_altrep_Coerce_method_t);
+}
+extern "C" {
+    pub fn R_set_altrep_Inspect_method(cls: R_altrep_class_t, fun: R_altrep_Inspect_method_t);
+}
+extern "C" {
+    pub fn R_set_altrep_Length_method(cls: R_altrep_class_t, fun: R_altrep_Length_method_t);
+}
+extern "C" {
+    pub fn R_set_altvec_Dataptr_method(cls: R_altrep_class_t, fun: R_altvec_Dataptr_method_t);
+}
+extern "C" {
+    pub fn R_set_altvec_Dataptr_or_null_method(
+        cls: R_altrep_class_t,
+        fun: R_altvec_Dataptr_or_null_method_t,
+    );
+}
+extern "C" {
+    pub fn R_set_altvec_Extract_subset_method(
+        cls: R_altrep_class_t,
+        fun: R_altvec_Extract_subset_method_t,
+    );
+}
+extern "C" {
+    pub fn R_set_altinteger_Elt_method(cls: R_altrep_class_t, fun: R_altinteger_Elt_method_t);
+}
+extern "C" {
+    pub fn R_set_altinteger_Get_region_method(
+        cls: R_altrep_class_t,
+        fun: R_altinteger_Get_region_method_t,
+    );
+}
+extern "C" {
+    pub fn R_set_altinteger_Is_sorted_method(
+        cls: R_altrep_class_t,
+        fun: R_altinteger_Is_sorted_method_t,
+    );
+}
+extern "C" {
+    pub fn R_set_altinteger_No_NA_method(cls: R_altrep_class_t, fun: R_altinteger_No_NA_method_t);
+}
+extern "C" {
+    pub fn R_set_altinteger_Sum_method(cls: R_altrep_class_t, fun: R_altinteger_Sum_method_t);
+}
+extern "C" {
+    pub fn R_set_altinteger_Min_method(cls: R_altrep_class_t, fun: R_altinteger_Min_method_t);
+}
+extern "C" {
+    pub fn R_set_altinteger_Max_method(cls: R_altrep_class_t, fun: R_altinteger_Max_method_t);
+}
+extern "C" {
+    pub fn R_set_altreal_Elt_method(cls: R_altrep_class_t, fun: R_altreal_Elt_method_t);
+}
+extern "C" {
+    pub fn R_set_altreal_Get_region_method(
+        cls: R_altrep_class_t,
+        fun: R_altreal_Get_region_method_t,
+    );
+}
+extern "C" {
+    pub fn R_set_altreal_Is_sorted_method(cls: R_altrep_class_t, fun: R_altreal_Is_sorted_method_t);
+}
+extern "C" {
+    pub fn R_set_altreal_No_NA_method(cls: R_altrep_class_t, fun: R_altreal_No_NA_method_t);
+}
+extern "C" {
+    pub fn R_set_altreal_Sum_method(cls: R_altrep_class_t, fun: R_altreal_Sum_method_t);
+}
+extern "C" {
+    pub fn R_set_altreal_Min_method(cls: R_altrep_class_t, fun: R_altreal_Min_method_t);
+}
+extern "C" {
+    pub fn R_set_altreal_Max_method(cls: R_altrep_class_t, fun: R_altreal_Max_method_t);
+}
+extern "C" {
+    pub fn R_set_altlogical_Elt_method(cls: R_altrep_class_t, fun: R_altlogical_Elt_method_t);
+}
+extern "C" {
+    pub fn R_set_altlogical_Get_region_method(
+        cls: R_altrep_class_t,
+        fun: R_altlogical_Get_region_method_t,
+    );
+}
+extern "C" {
+    pub fn R_set_altlogical_Is_sorted_method(
+        cls: R_altrep_class_t,
+        fun: R_altlogical_Is_sorted_method_t,
+    );
+}
+extern "C" {
+    pub fn R_set_altlogical_No_NA_method(cls: R_altrep_class_t, fun: R_altlogical_No_NA_method_t);
+}
+extern "C" {
+    pub fn R_set_altlogical_Sum_method(cls: R_altrep_class_t, fun: R_altlogical_Sum_method_t);
+}
+extern "C" {
+    pub fn R_set_altraw_Elt_method(cls: R_altrep_class_t, fun: R_altraw_Elt_method_t);
+}
+extern "C" {
+    pub fn R_set_altraw_Get_region_method(cls: R_altrep_class_t, fun: R_altraw_Get_region_method_t);
+}
+extern "C" {
+    pub fn R_set_altcomplex_Elt_method(cls: R_altrep_class_t, fun: R_altcomplex_Elt_method_t);
+}
+extern "C" {
+    pub fn R_set_altcomplex_Get_region_method(
+        cls: R_altrep_class_t,
+        fun: R_altcomplex_Get_region_method_t,
+    );
+}
+extern "C" {
+    pub fn R_set_altstring_Elt_method(cls: R_altrep_class_t, fun: R_altstring_Elt_method_t);
+}
+extern "C" {
+    pub fn R_set_altstring_Set_elt_method(cls: R_altrep_class_t, fun: R_altstring_Set_elt_method_t);
+}
+extern "C" {
+    pub fn R_set_altstring_Is_sorted_method(
+        cls: R_altrep_class_t,
+        fun: R_altstring_Is_sorted_method_t,
+    );
+}
+extern "C" {
+    pub fn R_set_altstring_No_NA_method(cls: R_altrep_class_t, fun: R_altstring_No_NA_method_t);
+}
 extern "C" {
     pub fn R_GE_getVersion() -> ::std::os::raw::c_int;
 }
diff --git a/wrapper.h b/wrapper.h
index 42c96c67..e9d1ba7c 100644
--- a/wrapper.h
+++ b/wrapper.h
@@ -26,4 +26,6 @@ typedef ptrdiff_t R_xlen_t_rust;
 #include <R_ext/Parse.h>
 #include <R_ext/Error.h>
 
+#include <R_ext/Rdynload.h>
+#include <R_ext/Altrep.h>
 #include <R_ext/GraphicsEngine.h>