diff --git a/coretk/coretk/dialogs/mobilityplayer.py b/coretk/coretk/dialogs/mobilityplayer.py
index 3ccf0b5d..6c9799b9 100644
--- a/coretk/coretk/dialogs/mobilityplayer.py
+++ b/coretk/coretk/dialogs/mobilityplayer.py
@@ -53,6 +53,7 @@ class MobilityPlayerDialog(Dialog):
         super().__init__(
             master, app, f"{canvas_node.core_node.name} Mobility Player", modal=False
         )
+        self.geometry("")
         self.canvas_node = canvas_node
         self.node = canvas_node.core_node
         self.config = config