diff --git a/build/systemMenu_tools/SystemUpdater/ARM9.TWL/Makefile b/build/systemMenu_tools/SystemUpdater/ARM9.TWL/Makefile
index aec3297e..666d5507 100644
--- a/build/systemMenu_tools/SystemUpdater/ARM9.TWL/Makefile
+++ b/build/systemMenu_tools/SystemUpdater/ARM9.TWL/Makefile
@@ -87,6 +87,9 @@ MAKEROM_FLAGS			+=	-DTITLEID_LO='$(TITLEID_LO)' \
 							-DPRIVKEY_PATH='$(TWL_KEYSDIR)/rsa' \
 							-DCARD_REGION='$(CARD_REGION)' \
 							-DDISABLE_DEBUG='$(DISABLE_DEBUG)'
+
+MAKEROM_FLAGS			:= $(filter-out -a,$(MAKEROM_FLAGS))
+
 MAKETAD_FLAGS			+=	-s
 
 SYSMENU_LIBS			=	\