diff --git a/core/combo/HOST_darwin-x86.mk b/core/combo/HOST_darwin-x86.mk
index 72117a2..5ab2c0d 100644
--- a/core/combo/HOST_darwin-x86.mk
+++ b/core/combo/HOST_darwin-x86.mk
@@ -26,11 +26,16 @@
 mac_sdk_version := 10.6
 mac_sdk_root := /Developer/SDKs/MacOSX$(mac_sdk_version).sdk
 ifeq ($(wildcard $(mac_sdk_root)),)
+recent_xcode4_mac_sdk_root := /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX$(mac_sdk_version).sdk
+ifeq ($(wildcard $(recent_xcode4_mac_sdk_root)),)
 $(warning *****************************************************)
 $(warning * Can not find SDK $(mac_sdk_version) at $(mac_sdk_root))
+$(warning * or $(recent_xcode4_mac_sdk_root))
 $(warning *****************************************************)
 $(error Stop.)
 endif
+mac_sdk_root := $(recent_xcode4_mac_sdk_root)
+endif
 
 HOST_GLOBAL_CFLAGS += -isysroot $(mac_sdk_root) -mmacosx-version-min=$(mac_sdk_version)
 HOST_GLOBAL_LDFLAGS += -isysroot $(mac_sdk_root) -mmacosx-version-min=$(mac_sdk_version)