diff --git a/win32/common/config.h.in b/win32/common/config.h.in
index 801722e6e9..4d34725a42 100644
--- a/win32/common/config.h.in
+++ b/win32/common/config.h.in
@@ -234,9 +234,3 @@
 
 /* Define to 1 if the X Window System is missing or not being used. */
 #undef X_DISPLAY_MISSING
-
-/* Define to `__inline__' or `__inline' if that's what the C compiler
-   calls it, or to nothing if 'inline' is not supported under any name.  */
-#ifndef __cplusplus
-#undef inline
-#endif