diff --git a/libretro-test-gl/Makefile b/libretro-test-gl/Makefile
index 26e246926d..b5473e3531 100644
--- a/libretro-test-gl/Makefile
+++ b/libretro-test-gl/Makefile
@@ -24,6 +24,7 @@ else ifeq ($(platform), osx)
    fpic := -fPIC
    SHARED := -dynamiclib
    GL_LIB := -framework OpenGL
+   CFLAGS += -DOSX
 else ifeq ($(platform), pi)
    TARGET := $(TARGET_NAME)_libretro.so
    fpic := -fPIC