diff --git a/src/x11client.cpp b/src/x11client.cpp
index 3cf9f4040e..21fe7b6006 100644
--- a/src/x11client.cpp
+++ b/src/x11client.cpp
@@ -1043,6 +1043,10 @@ void X11Client::updateInputWindow()
     if (!Xcb::Extensions::self()->isShapeInputAvailable())
         return;
 
+    if (kwinApp()->operationMode() != Application::OperationModeX11) {
+        return;
+    }
+
     QRegion region;
 
     if (!noBorder() && isDecorated()) {