diff --git a/pep-0599.rst b/pep-0599.rst
index ac0f2963eed..15c9b4c8e10 100644
--- a/pep-0599.rst
+++ b/pep-0599.rst
@@ -164,7 +164,7 @@ the ``manylinux2014`` tag:
    they may only depend on the following maximum versions::
 
        GLIBC_2.17
-       CXXABI_1.3.7
+       CXXABI_1.3.7, CXXABI_TM_1 is also allowed
        GLIBCXX_3.4.19
        GCC_4.8.0