diff --git a/Include/pymacro.h b/Include/pymacro.h
index b959eeb3f58b35..90ad8f07844460 100644
--- a/Include/pymacro.h
+++ b/Include/pymacro.h
@@ -12,8 +12,10 @@
// static_assert is defined in glibc from version 2.16. Before it requires
// compiler support (gcc >= 4.6) and is called _Static_assert.
+// In C++ 11 static_assert is a keyword, redefining is undefined behaviour.
#if (defined(__GLIBC__) \
&& (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ <= 16)) \
+ && !(defined(__cplusplus) && __cplusplus >= 201103L) \
&& !defined(static_assert))
# define static_assert _Static_assert
#endif
diff --git a/Misc/NEWS.d/next/C API/2022-06-10-23-41-48.gh-issue-91731.fhYUQG.rst b/Misc/NEWS.d/next/C API/2022-06-10-23-41-48.gh-issue-91731.fhYUQG.rst
new file mode 100644
index 00000000000000..185671ca4fcfb1
--- /dev/null
+++ b/Misc/NEWS.d/next/C API/2022-06-10-23-41-48.gh-issue-91731.fhYUQG.rst
@@ -0,0 +1,3 @@
+Avoid defining the ``static_assert`` when compiling with C++ 11, where this
+is a keyword and redefining it can lead to undefined behavior. Patch by
+Pablo Galindo
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