diff --git a/src/Makefile.cfg b/src/Makefile.cfg
index 68cced81..5f0096d6 100644
--- a/src/Makefile.cfg
+++ b/src/Makefile.cfg
@@ -20,7 +20,7 @@ GCC64=1
 endif
 
 ifdef GCC64
-GCC64=1
+GCC63=1
 endif
 
 ifdef GCC63