diff --git a/Makefile b/Makefile
index c7751a6..0d79a39 100644
--- a/Makefile
+++ b/Makefile
@@ -31,3 +31,4 @@ clean:
 	rm -f *.obj
 	rm -f greenspace.smc
 	rm -f tic_tac.smc
+	rm -f test_gfx.smc