diff --git a/xpra/server/window/video_compress.py b/xpra/server/window/video_compress.py
index b4227f6e3f..61b9753ae3 100644
--- a/xpra/server/window/video_compress.py
+++ b/xpra/server/window/video_compress.py
@@ -676,6 +676,7 @@ def gstreamer_nodamage(self) -> None:
     def cancel_gstreamer_timer(self) -> None:
         gt = self.gstreamer_timer
         if gt:
+            self.gstreamer_timer = 0
             GLib.source_remove(gt)
 
     def start_gstreamer_pipeline(self) -> bool: