diff --git a/src/dlangui/platforms/x11/x11app.d b/src/dlangui/platforms/x11/x11app.d
index 97112a06..019b5d8f 100644
--- a/src/dlangui/platforms/x11/x11app.d
+++ b/src/dlangui/platforms/x11/x11app.d
@@ -428,8 +428,13 @@ class X11Window : DWindow {
 				Log.d("Open GL support is disabled");
 			}
 		}
-		if (_mainWidget)
-			_mainWidget.setFocus();
+        if (_mainWidget) {
+            _mainWidget.measure(SIZE_UNSPECIFIED, SIZE_UNSPECIFIED);
+            _windowRect.right = _dx;// hack to set windowRect, remove when _windowRect will be full supported on X11
+            _windowRect.bottom = _dy;
+            adjustWindowOrContentSize(_mainWidget.measuredWidth, _mainWidget.measuredHeight);
+            _mainWidget.setFocus();
+        }
 	}
 
 	protected final void changeWindowState(int action, Atom firstProperty, Atom secondProperty = None) nothrow