diff --git a/Scripts/NodePort.cs b/Scripts/NodePort.cs
index f7d6f97..9fa465e 100644
--- a/Scripts/NodePort.cs
+++ b/Scripts/NodePort.cs
@@ -301,7 +301,7 @@ namespace XNode {
             }
             // Trigger OnRemoveConnection
             node.OnRemoveConnection(this);
-            if (port != null) port.node.OnRemoveConnection(port);
+            if (port != null && port.IsConnectedTo(this)) port.node.OnRemoveConnection(port);
         }
 
         /// <summary> Disconnect this port from another port </summary>