diff --git a/Mac/Python/macgetcompiler.c b/Mac/Python/macgetcompiler.c
index 15dba4b2331..999e74a9c60 100644
--- a/Mac/Python/macgetcompiler.c
+++ b/Mac/Python/macgetcompiler.c
@@ -1,5 +1,7 @@
 /* Return a string representing the compiler name */
 
+#include "config.h"
+
 #ifdef THINK_C
 #define COMPILER " [THINK C]"
 #endif