diff --git a/code/core/arm9/Makefile b/code/core/arm9/Makefile
index 41ec0c6..1589e6d 100644
--- a/code/core/arm9/Makefile
+++ b/code/core/arm9/Makefile
@@ -57,7 +57,7 @@ INCLUDES	:=	include source ../common ../../libs/mini-printf
 # options for code generation
 #---------------------------------------------------------------------------------
 ARCH	:=	-marm -mthumb-interwork -march=armv5te -mtune=arm946e-s \
-			-DLIBTWL_ARM9 -DARM9 -DGBAR3_IRQ_YIELDING
+			-DLIBTWL_ARM9 -DARM9 #-DGBAR3_IRQ_YIELDING
 
 CFLAGS	:=	-g -Wall -O2\
 			 -fomit-frame-pointer\