diff --git a/packages/node_modules/@node-red/editor-client/src/js/ui/view.js b/packages/node_modules/@node-red/editor-client/src/js/ui/view.js
index 825e78a07..c459de1ff 100644
--- a/packages/node_modules/@node-red/editor-client/src/js/ui/view.js
+++ b/packages/node_modules/@node-red/editor-client/src/js/ui/view.js
@@ -3640,9 +3640,9 @@ RED.view = (function() {
         return tooltip;
     }
 
-    function portMouseOver(port,d,portType,portIndex) {
+    function portMouseOver(port,d,portType,portIndex, event) {
         if (mouse_mode === RED.state.SELECTING_NODE) {
-            d3.event.stopPropagation();
+            (d3.event || event).stopPropagation();
             return;
         }
         clearTimeout(portLabelHoverTimeout);
@@ -3681,9 +3681,9 @@ RED.view = (function() {
         }
         port.classed("red-ui-flow-port-hovered",active);
     }
-    function portMouseOut(port,d,portType,portIndex) {
+    function portMouseOut(port,d,portType,portIndex, event) {
         if (mouse_mode === RED.state.SELECTING_NODE) {
-            d3.event.stopPropagation();
+            (d3.event || event).stopPropagation();
             return;
         }
         clearTimeout(portLabelHoverTimeout);