diff --git a/src/DesktopIntegration.vala b/src/DesktopIntegration.vala
index c59ceb994..97c3c1aaa 100644
--- a/src/DesktopIntegration.vala
+++ b/src/DesktopIntegration.vala
@@ -44,6 +44,10 @@ public class Gala.DesktopIntegration : GLib.Object {
             return false;
         }
 
+        if (ShellClientsManager.get_instance ().is_positioned_window (window)) {
+            return false;
+        }
+
         switch (window.get_window_type ()) {
             case Meta.WindowType.NORMAL:
             case Meta.WindowType.DIALOG: