diff --git a/include/eepp/ui/uiwindow.hpp b/include/eepp/ui/uiwindow.hpp
index e7732cd3e..073f62000 100644
--- a/include/eepp/ui/uiwindow.hpp
+++ b/include/eepp/ui/uiwindow.hpp
@@ -111,8 +111,9 @@ class EE_API UIWindow : public UIWidget {
 
 		void invalidate();
 
-		FrameBuffer * getFrameBuffer() const;
+		bool invalidated();
 
+		FrameBuffer * getFrameBuffer() const;
 	protected:
 		class KeyboardShortcut {
 			public:
diff --git a/src/eepp/ui/uiwindow.cpp b/src/eepp/ui/uiwindow.cpp
index 3ff3c7239..e4527876b 100644
--- a/src/eepp/ui/uiwindow.cpp
+++ b/src/eepp/ui/uiwindow.cpp
@@ -1162,6 +1162,10 @@ FrameBuffer * UIWindow::getFrameBuffer() const {
 	return mFrameBuffer;
 }
 
+bool UIWindow::invalidated() {
+	return 0 != ( mControlFlags & UI_CTRL_FLAG_NEEDS_REDRAW );
+}
+
 void UIWindow::matrixSet() {
 	if ( ownsFrameBuffer() ) {
 		if ( NULL != mFrameBuffer ) {