1 files changed, 2 insertions, 1 deletions
diff --git a/config.mk b/config.mk
index b234d947..ee37bb26 100644
--- a/config.mk
+++ b/config.mk
@@ -157,11 +157,12 @@ endif
 
 CFLAGS_OPTIONS := $(CFLAGS)
 
-ifeq (USEGTK3, 1) 
+ifeq (${USEGTK3}, 1) 
 CPPFLAGS+=-DGTK_DISABLE_SINGLE_INCLUDES
 CPPFLAGS+=-DGTK_DISABLE_DEPRECATED
 CPPFLAGS+=-DGDK_DISABLE_DEPRECATED
 CPPFLAGS+=-DGSEAL_ENABLE
+M4FLAGS += --define=WITH_GTK3=1
 endif