diff --git a/KTVHTTPCache/CocoaHTTPServer/WebSocket.m b/KTVHTTPCache/CocoaHTTPServer/WebSocket.m
index 4b6bbed7..ef2871fe 100755
--- a/KTVHTTPCache/CocoaHTTPServer/WebSocket.m
+++ b/KTVHTTPCache/CocoaHTTPServer/WebSocket.m
@@ -113,7 +113,7 @@ + (BOOL)isWebSocketRequest:(HTTPMessage *)request
 	if (!upgradeHeaderValue || !connectionHeaderValue) {
 		isWebSocket = NO;
 	}
-	else if (![upgradeHeaderValue caseInsensitiveCompare:@"WebSocket"] == NSOrderedSame) {
+	else if ([upgradeHeaderValue caseInsensitiveCompare:@"WebSocket"] != NSOrderedSame) {
 		isWebSocket = NO;
 	}
 	else if ([connectionHeaderValue rangeOfString:@"Upgrade" options:NSCaseInsensitiveSearch].location == NSNotFound) {