diff -aruN a/CFBase.c b/CFBase.c
--- a/CFBase.c	2011-08-10 16:29:35.458178493 -0700
+++ b/CFBase.c	2011-08-10 16:31:27.000000000 -0700
@@ -270,7 +270,7 @@
     malloc_zone_free((malloc_zone_t*)info, ptr);
 }
 
-#endif
+#endif /* DEPLOYMENT_TARGET_MACOSX */
 
 #if DEPLOYMENT_TARGET_WINDOWS || DEPLOYMENT_TARGET_LINUX || DEPLOYMENT_TARGET_FREEBSD
 static void *__CFAllocatorSystemAllocate(CFIndex size, CFOptionFlags hint, void *info) {
@@ -685,7 +685,7 @@
 	    malloc_zone_free((malloc_zone_t *)allocator, ptr);
 	    return NULL;
 	}
-#endif
+#endif /* DEPLOYMENT_TARGET_MACOSX */
 	deallocateFunc = __CFAllocatorGetDeallocateFunction(&allocator->_context);
 	if (NULL != deallocateFunc) {
 	    INVOKE_CALLBACK2(deallocateFunc, ptr, allocator->_context.info);
@@ -722,7 +722,7 @@
 #endif
 	return malloc_zone_free((malloc_zone_t *)allocator, ptr);
     }
-#endif
+#endif /* DEPLOYMENT_TARGET_MACOSX */
     deallocateFunc = __CFAllocatorGetDeallocateFunction(&allocator->_context);
     if (NULL != ptr && NULL != deallocateFunc) {
 	INVOKE_CALLBACK2(deallocateFunc, ptr, allocator->_context.info);