diff --git a/YYKit/Utility/YYWeakProxy.m b/YYKit/Utility/YYWeakProxy.m
index fbf648df..548728da 100644
--- a/YYKit/Utility/YYWeakProxy.m
+++ b/YYKit/Utility/YYWeakProxy.m
@@ -28,12 +28,11 @@ - (id)forwardingTargetForSelector:(SEL)selector {
 }
 
 - (void)forwardInvocation:(NSInvocation *)invocation {
-    void *null = NULL;
-    [invocation setReturnValue:&null];
+    [invocation invokeWithTarget:_target];
 }
 
 - (NSMethodSignature *)methodSignatureForSelector:(SEL)selector {
-    return [NSObject instanceMethodSignatureForSelector:@selector(init)];
+    return [_target methodSignatureForSelector:selector];
 }
 
 - (BOOL)respondsToSelector:(SEL)aSelector {