diff --git a/js/ui/panel.js b/js/ui/panel.js
index 94dffda73..cac922ac8 100644
--- a/js/ui/panel.js
+++ b/js/ui/panel.js
@@ -540,24 +540,16 @@ class Panel extends St.Widget {
         if (targetActor !== this)
             return Clutter.EVENT_PROPAGATE;
 
-        const [x, y] = event.get_coords();
+        const [x, y_] = event.get_coords();
         let dragWindow = this._getDraggableWindowForPosition(x);
 
         if (!dragWindow)
             return Clutter.EVENT_PROPAGATE;
 
-        const button = event.type() === Clutter.EventType.BUTTON_PRESS
-            ? event.get_button() : -1;
-
-        return global.display.begin_grab_op(
-            dragWindow,
+        return dragWindow.begin_grab_op(
             Meta.GrabOp.MOVING,
-            false, /* pointer grab */
             true, /* frame action */
-            button,
-            event.get_state(),
-            event.get_time(),
-            x, y) ? Clutter.EVENT_STOP : Clutter.EVENT_PROPAGATE;
+            event.get_time()) ? Clutter.EVENT_STOP : Clutter.EVENT_PROPAGATE;
     }
 
     _onButtonPress(actor, event) {