diff --git a/pkgs/development/compilers/gcc/11/Added-mcf-thread-model-support-from-mcfgthread.patch b/pkgs/development/compilers/gcc/11/Added-mcf-thread-model-support-from-mcfgthread.patch
index d9809e828f1..77202438e47 100644
--- a/pkgs/development/compilers/gcc/11/Added-mcf-thread-model-support-from-mcfgthread.patch
+++ b/pkgs/development/compilers/gcc/11/Added-mcf-thread-model-support-from-mcfgthread.patch
@@ -222,16 +222,16 @@ index de920d714c6..665fb74bd6b 100644
 +#ifdef __USING_MCFGTHREAD__
 +
 +#include <mcfgthread/gthread.h>
-+
++namespace __cxxabiv1 {
 +extern "C" int
-+__cxxabiv1::__cxa_thread_atexit (void (*dtor)(void *),
++__cxa_thread_atexit (void (_GLIBCXX_CDTOR_CALLABI *dtor)(void *),
 +				 void *obj, void *dso_handle)
 +  _GLIBCXX_NOTHROW
 +{
 +  return ::_MCFCRT_AtThreadExit((void (*)(_MCFCRT_STD intptr_t))dtor, (_MCFCRT_STD intptr_t)obj) ? 0 : -1;
 +  (void)dso_handle;
 +}
-+
++}
 +#else // __USING_MCFGTHREAD__
 +
  #ifdef _GLIBCXX_THREAD_ATEXIT_WIN32