diff --git a/plugins/scenes/opengl/scene_opengl.cpp b/plugins/scenes/opengl/scene_opengl.cpp
--- a/plugins/scenes/opengl/scene_opengl.cpp
+++ b/plugins/scenes/opengl/scene_opengl.cpp
@@ -818,7 +818,7 @@
         // TODO: On Wayland we can't suspend. Find a solution that works here as well!
         return true;
     }
-    GLint limit[2];
+    GLint limit[2] = {size.width(), size.height()};
     glGetIntegerv(GL_MAX_VIEWPORT_DIMS, limit);
     if (limit[0] < size.width() || limit[1] < size.height()) {
         auto compositor = static_cast<X11Compositor*>(Compositor::self());