diff --git a/web/src/js/filt/filt.js b/web/src/js/filt/filt.js
index 7d496bd4b..21b8646b1 100644
--- a/web/src/js/filt/filt.js
+++ b/web/src/js/filt/filt.js
@@ -2279,7 +2279,7 @@ export default (function() {
 
     // ~websocket
     function websocketFilter(flow){
-        return flow.type === "websocket";
+        return !!flow.websocket;
     }
     websocketFilter.desc = "is a Websocket Flow";
 
diff --git a/web/src/js/filt/filt.peg b/web/src/js/filt/filt.peg
index 360324562..647a06f2e 100644
--- a/web/src/js/filt/filt.peg
+++ b/web/src/js/filt/filt.peg
@@ -300,7 +300,7 @@ function url(regex){
 
 // ~websocket
 function websocketFilter(flow){
-    return flow.type === "websocket";
+    return !!flow.websocket;
 }
 websocketFilter.desc = "is a Websocket Flow";
 }