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 999c98587..10d47027d 100755
--- 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
@@ -2414,11 +2414,16 @@ RED.view = (function() {
                         // This is not a virtualLink - which means it started
                         // on a regular node port. Need to ensure the this isn't
                         // connecting to a link node virual port.
+                        //
+                        // PORT_TYPE_OUTPUT=0
+                        // PORT_TYPE_INPUT=1
                         if (!(
                             (d.type === "link out" && portType === PORT_TYPE_OUTPUT) ||
                             (d.type === "link in" && portType === PORT_TYPE_INPUT) ||
-                            (portType === PORT_TYPE_OUTPUT && mouseup_node.outputs === 0) ||
-                            (portType === PORT_TYPE_INPUT && mouseup_node.inputs === 0)
+                            (portType === PORT_TYPE_OUTPUT && mouseup_node.type !== "subflow" && mouseup_node.outputs === 0) ||
+                            (portType === PORT_TYPE_INPUT && mouseup_node.type !== "subflow" && mouseup_node.inputs === 0) ||
+                            (drag_line.portType === PORT_TYPE_INPUT && mouseup_node.type === "subflow" && (mouseup_node.direction === "status" || mouseup_node.direction === "out")) ||
+                            (drag_line.portType === PORT_TYPE_OUTPUT && mouseup_node.type === "subflow" && mouseup_node.direction === "in")
                         )) {
                             var existingLink = RED.nodes.filterLinks({source:src,target:dst,sourcePort: src_port}).length !== 0;
                             if (!existingLink) {