diff --git a/src/litegraph.d.ts b/src/litegraph.d.ts
index 1e2ac38a3..8d7e6298d 100644
--- a/src/litegraph.d.ts
+++ b/src/litegraph.d.ts
@@ -860,7 +860,7 @@ export declare class LGraphNode {
      * @param target_node the target node to which this slot is connected [Optional, if not target_node is specified all nodes will be disconnected]
      * @return if it was disconnected successfully
      */
-    disconnectOutput(slot: number | string, targetNode: LGraphNode): boolean;
+    disconnectOutput(slot: number | string, targetNode?: LGraphNode): boolean;
     /**
      * disconnect one input
      * @param slot (could be the number of the slot or the string with the name of the slot)