diff --git a/src/Avalonia.X11/X11Window.cs b/src/Avalonia.X11/X11Window.cs
index e5373ce42f..eab373de6d 100644
--- a/src/Avalonia.X11/X11Window.cs
+++ b/src/Avalonia.X11/X11Window.cs
@@ -629,6 +629,8 @@ namespace Avalonia.X11
                     ChangeWMAtoms(false, _x11.Atoms._NET_WM_STATE_FULLSCREEN);
                     ChangeWMAtoms(false, _x11.Atoms._NET_WM_STATE_MAXIMIZED_VERT,
                         _x11.Atoms._NET_WM_STATE_MAXIMIZED_HORZ);
+                    SendNetWMMessage(_x11.Atoms._NET_ACTIVE_WINDOW, (IntPtr)1, _x11.LastActivityTimestamp,
+                        IntPtr.Zero);
                 }
             }
         }