diff --git a/Makefile b/Makefile
index 451e9084b..2c1535eae 100644
--- a/Makefile
+++ b/Makefile
@@ -121,7 +121,7 @@ $(pokecrystal11_vc_obj):    RGBASMFLAGS += -D _CRYSTAL11 -D _CRYSTAL11_VC
 	tools/make_patch $*_vc.sym $^ $@
 
 rgbdscheck.o: rgbdscheck.asm
-	$(RGBASM) $(RGBASMFLAGS) -o $@ $<
+	$(RGBASM) -o $@ $<
 
 # The dep rules have to be explicit or else missing files won't be reported.
 # As a side effect, they're evaluated immediately instead of when the rule is invoked.