--- libdumb-0.9.3.orig/Makefile
+++ libdumb-0.9.3/Makefile
@@ -231,8 +231,8 @@
 endif
 endif
 
-CFLAGS_RELEASE := -Iinclude $(WFLAGS) $(OFLAGS)
-CFLAGS_DEBUG := -Iinclude $(WFLAGS) $(DBGFLAGS)
+CFLAGS_RELEASE := -Iinclude $(WFLAGS) $(OFLAGS) $(CFLAGS_EXTRA)
+CFLAGS_DEBUG := -Iinclude $(WFLAGS) $(DBGFLAGS) $(CFLAGS_EXTRA)
 
 LDFLAGS := -s