diff --git a/src/deflate.rs b/src/deflate.rs
index 3b4571ab1..1270a8202 100644
--- a/src/deflate.rs
+++ b/src/deflate.rs
@@ -25,7 +25,7 @@ pub struct EncoderWriter<W: Write> {
 ///
 /// This structure implements a `Read` interface and will read uncompressed
 /// data from an underlying stream and emit a stream of compressed data.
-pub struct EncoderReader<R: Read> {
+pub struct EncoderReader {
     inner: EncoderReaderBuf<BufReader<R>>,
 }
 
@@ -33,7 +33,7 @@ pub struct EncoderReader<R: Read> {
 ///
 /// This structure implements a `BufRead` interface and will read uncompressed
 /// data from an underlying stream and emit a stream of compressed data.
-pub struct EncoderReaderBuf<R: BufRead> {
+pub struct EncoderReaderBuf {
     obj: R,
     data: Compress,
 }
@@ -42,7 +42,7 @@ pub struct EncoderReaderBuf<R: BufRead> {
 ///
 /// This structure implements a `Read` interface and takes a stream of
 /// compressed data as input, providing the decompressed data when read from.
-pub struct DecoderReader<R: Read> {
+pub struct DecoderReader {
     inner: DecoderReaderBuf<BufReader<R>>,
 }
 
@@ -50,7 +50,7 @@ pub struct DecoderReader<R: Read> {
 ///
 /// This structure implements a `BufRead` interface and takes a stream of
 /// compressed data as input, providing the decompressed data when read from.
-pub struct DecoderReaderBuf<R: BufRead> {
+pub struct DecoderReaderBuf {
     obj: R,
     data: Decompress,
 }
diff --git a/src/gz.rs b/src/gz.rs
index 42bc9c0e8..de6321d0e 100644
--- a/src/gz.rs
+++ b/src/gz.rs
@@ -41,7 +41,7 @@ pub struct EncoderWriter<W: Write> {
 /// This structure exposes a `Read` interface that will read uncompressed data
 /// from the underlying reader and expose the compressed version as a `Read`
 /// interface.
-pub struct EncoderReader<R: Read> {
+pub struct EncoderReader {
     inner: EncoderReaderBuf<BufReader<R>>,
 }
 
@@ -50,7 +50,7 @@ pub struct EncoderReader<R: Read> {
 /// This structure exposes a `Read` interface that will read uncompressed data
 /// from the underlying reader and expose the compressed version as a `Read`
 /// interface.
-pub struct EncoderReaderBuf<R: BufRead> {
+pub struct EncoderReaderBuf {
     inner: deflate::EncoderReaderBuf<CrcReader<R>>,
     header: Vec<u8>,
     pos: usize,
@@ -71,7 +71,7 @@ pub struct Builder {
 ///
 /// This structure exposes a `Read` interface that will consume compressed
 /// data from the underlying reader and emit uncompressed data.
-pub struct DecoderReader<R: Read> {
+pub struct DecoderReader {
     inner: DecoderReaderBuf<BufReader<R>>,
 }
 
@@ -86,7 +86,7 @@ pub struct DecoderReader<R: Read> {
 ///
 /// This structure exposes a `Read` interface that will consume all gzip members
 /// from the underlying reader and emit uncompressed data.
-pub struct MultiDecoderReader<R: Read> {
+pub struct MultiDecoderReader {
     inner: MultiDecoderReaderBuf<BufReader<R>>,
 }
 
@@ -94,7 +94,7 @@ pub struct MultiDecoderReader<R: Read> {
 ///
 /// This structure exposes a `Read` interface that will consume compressed
 /// data from the underlying reader and emit uncompressed data.
-pub struct DecoderReaderBuf<R: BufRead> {
+pub struct DecoderReaderBuf {
     inner: CrcReader<deflate::DecoderReaderBuf<R>>,
     header: Header,
     finished: bool,
@@ -111,7 +111,7 @@ pub struct DecoderReaderBuf<R: BufRead> {
 ///
 /// This structure exposes a `Read` interface that will consume all gzip members
 /// from the underlying reader and emit uncompressed data.
-pub struct MultiDecoderReaderBuf<R: BufRead> {
+pub struct MultiDecoderReaderBuf {
     inner: CrcReader<deflate::DecoderReaderBuf<R>>,
     header: Header,
     finished: bool,