diff --git a/makefile b/makefile
index 49a2bf0ff6..4a481f9c7b 100755
--- a/makefile
+++ b/makefile
@@ -322,17 +322,18 @@ ifeq ($(platform),darwin)
 
 	sdk-dir = $(developer-dir)/Platforms/iPhoneOS.platform/Developer/SDKs
 
-	ios-version := $(shell if test -d $(sdk-dir)/iPhoneOS5.1.sdk; then echo 5.1; \
-  elif test -d $(sdk-dir)/iPhoneOS5.0.sdk; then echo 5.0; \
-  elif test -d $(sdk-dir)/iPhoneOS4.3.sdk; then echo 4.3; \
-  elif test -d $(sdk-dir)/iPhoneOS4.2.sdk; then echo 4.2; \
-  else echo; fi)
-
- 	ifeq ($(ios-version),)
-  	 x := $(error "couldn't find SDK for iOS version")
-	endif
-
 	ifeq ($(arch),arm)
+		ios-version := \
+			$(shell if test -d $(sdk-dir)/iPhoneOS5.1.sdk; then echo 5.1; \
+				elif test -d $(sdk-dir)/iPhoneOS5.0.sdk; then echo 5.0; \
+				elif test -d $(sdk-dir)/iPhoneOS4.3.sdk; then echo 4.3; \
+				elif test -d $(sdk-dir)/iPhoneOS4.2.sdk; then echo 4.2; \
+				else echo; fi)
+
+		ifeq ($(ios-version),)
+			x := $(error "couldn't find SDK for iOS version")
+		endif
+
 		ifeq ($(build-arch),powerpc)
 			converter-cflags += -DOPPOSITE_ENDIAN
 		endif