diff --git a/types/paper/index.d.ts b/types/paper/index.d.ts
index f75661377a..46d5f58786 100644
--- a/types/paper/index.d.ts
+++ b/types/paper/index.d.ts
@@ -1305,7 +1305,12 @@ declare module 'paper' {
          * The function to be called when the mouse button is pushed down on the item. The function receives a MouseEvent object which contains information about the mouse event.
          */
         onMouseDown: (event: MouseEvent) => void;
-
+        
+        /**
+         * The function to be called when the mouse position changes while the mouse is being dragged. The function receives a MouseEvent object which contains information about the mouse event.
+         */
+        onMouseDrag: (event: MouseEvent) => void;
+        
         /**
          * The function to be called when the mouse button is released over the item.
          * The function receives a MouseEvent object which contains information about the mouse event.