diff --git a/WYPopoverController/WYPopoverController.m b/WYPopoverController/WYPopoverController.m
index 34ea4862..816965b5 100644
--- a/WYPopoverController/WYPopoverController.m
+++ b/WYPopoverController/WYPopoverController.m
@@ -317,7 +317,8 @@ - (void)sizzled_setPreferredContentSize:(CGSize)aSize
     {
 #ifdef WY_BASE_SDK_7_ENABLED
         if ([self respondsToSelector:@selector(setPreferredContentSize:)]) {
-            [self.navigationController setPreferredContentSize:aSize];
+//            [self.navigationController setPreferredContentSize:aSize];
+            [self.navigationController sizzled_setPreferredContentSize:aSize];
         }
 #endif
     }