diff --git a/racket/src/ChezScheme/c/segment.h b/racket/src/ChezScheme/c/segment.h
index 6f43394c00..3012e7b06b 100644
--- a/racket/src/ChezScheme/c/segment.h
+++ b/racket/src/ChezScheme/c/segment.h
@@ -15,11 +15,11 @@
  */
 
 #ifdef WIN32
+# undef FORCEINLINE
 # ifndef __MINGW32__
-#  undef FORCEINLINE
 #  define FORCEINLINE static __forceinline
 # else
-#  define FORCEINLINE static
+#  define FORCEINLINE static __attribute__((__always_inline__)) inline
 # endif
 #else
 #define FORCEINLINE static inline