diff --git a/Source/Makefile b/Source/Makefile
index 5351f719..77dfbfc3 100644
--- a/Source/Makefile
+++ b/Source/Makefile
@@ -15,13 +15,11 @@ clean:
 
 release:
 	@killall -9 McBopomofo; sleep 2
-	xcodebuild -target Lettuce -configuration Release \
-	-arch i386 -arch x86_64
+	xcodebuild -target Lettuce -configuration Release
 
 debug:
 	@killall -9 McBopomofo; sleep 2
-	xcodebuild -target Lettuce -configuration Debug \
-	-arch i386 -arch x86_64
+	xcodebuild -target Lettuce -configuration Debug
 
 install: release
 	$(HOME)/Library/Input\ Methods/McBopomofo.app/Contents/MacOS/McBopomofo install