fix gate to deal with GTM_MACOS_SDK being defined to zero
diff --git a/Foundation/GTMSystemVersionTest.m b/Foundation/GTMSystemVersionTest.m
index 42a1b77..6e46ec5 100644
--- a/Foundation/GTMSystemVersionTest.m
+++ b/Foundation/GTMSystemVersionTest.m
@@ -91,7 +91,7 @@
 
 }
 
-#ifdef GTM_MACOS_SDK
+#if GTM_MACOS_SDK
 - (void)testMacOSVersion {
   SInt32 major = -1;
   SInt32 minor = -1;
@@ -116,4 +116,5 @@
   }
 }
 #endif
+
 @end