diff --git a/config/Makefile.darwin b/config/Makefile.darwin
index bf34a0e..56fd584 100644
--- a/config/Makefile.darwin
+++ b/config/Makefile.darwin
@@ -2,6 +2,7 @@ NAME = $(GLEW_NAME)
 CC = cc
 LD = cc
 CFLAGS.EXTRA = -dynamic -fno-common
+CFLAGS.EXTRA += -ansi -pedantic
 #CFLAGS.EXTRA += -no-cpp-precomp
 LDFLAGS.EXTRA =
 ifneq (undefined, $(origin GLEW_APPLE_GLX))