diff --git a/iPhoneTracking.xcodeproj/project.pbxproj b/iPhoneTracking.xcodeproj/project.pbxproj
index b1ae7f7..8c08554 100644
--- a/iPhoneTracking.xcodeproj/project.pbxproj
+++ b/iPhoneTracking.xcodeproj/project.pbxproj
@@ -313,7 +313,7 @@
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				PREBINDING = NO;
-				SDKROOT = macosx10.6;
+				SDKROOT = macosx10.5;
 			};
 			name = Debug;
 		};
diff --git a/iPhoneTrackingAppDelegate.h b/iPhoneTrackingAppDelegate.h
index f11a56e..f122f18 100644
--- a/iPhoneTrackingAppDelegate.h
+++ b/iPhoneTrackingAppDelegate.h
@@ -8,7 +8,11 @@
 #import <Cocoa/Cocoa.h>
 #import <WebKit/WebKit.h>
 
+#if (MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_5)
+@interface iPhoneTrackingAppDelegate : NSObject {
+#else
 @interface iPhoneTrackingAppDelegate : NSObject <NSApplicationDelegate> {
+#endif
   NSWindow *window;
   WebView *webView;
   WebScriptObject* scriptObject;