diff --git a/mingw-w64-headers/crt/assert.h b/mingw-w64-headers/crt/assert.h
index 3abda81..df03328 100644
--- a/mingw-w64-headers/crt/assert.h
+++ b/mingw-w64-headers/crt/assert.h
@@ -29,14 +29,14 @@
   __CRT_INLINE __MINGW_ATTRIB_NORETURN void  __cdecl _Exit(int status)
   {  _exit(status); }
 #endif /* !__CRT__NO_INLINE */
-#endif
+#endif /* Not  __NO_ISOCEXT */
 
 #pragma push_macro("abort")
 #undef abort
   void __cdecl __declspec(noreturn) abort(void);
 #pragma pop_macro("abort")
 
-#endif
+#endif /* _CRT_TERMINATE_DEFINED */
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/mingw-w64-headers/crt/process.h b/mingw-w64-headers/crt/process.h
index 8a168e0..8b32fc7 100644
--- a/mingw-w64-headers/crt/process.h
+++ b/mingw-w64-headers/crt/process.h
@@ -43,14 +43,14 @@
   __CRT_INLINE __MINGW_ATTRIB_NORETURN void  __cdecl _Exit(int status)
   {  _exit(status); }
 #endif /* !__CRT__NO_INLINE */
-#endif
+#endif /* Not  __NO_ISOCEXT */
 
 #pragma push_macro("abort")
 #undef abort
   void __cdecl __declspec(noreturn) abort(void);
 #pragma pop_macro("abort")
 
-#endif
+#endif /* _CRT_TERMINATE_DEFINED */
 
   _CRTIMP void __cdecl __MINGW_NOTHROW _cexit(void);
   _CRTIMP void __cdecl __MINGW_NOTHROW _c_exit(void);
diff --git a/mingw-w64-headers/crt/stdlib.h b/mingw-w64-headers/crt/stdlib.h
index 2161a2a..386afa3 100644
--- a/mingw-w64-headers/crt/stdlib.h
+++ b/mingw-w64-headers/crt/stdlib.h
@@ -314,14 +314,14 @@
   __CRT_INLINE __MINGW_ATTRIB_NORETURN void  __cdecl _Exit(int status)
   {  _exit(status); }
 #endif /* !__CRT__NO_INLINE */
-#endif
+#endif /* Not  __NO_ISOCEXT */
 
 #pragma push_macro("abort")
 #undef abort
   void __cdecl __declspec(noreturn) abort(void);
 #pragma pop_macro("abort")
 
-#endif
+#endif /* _CRT_TERMINATE_DEFINED */
 
   _CRTIMP unsigned int __cdecl _set_abort_behavior(unsigned int _Flags,unsigned int _Mask);