diff --git a/imgui.cpp b/imgui.cpp
index 7b056e94..6a7048cb 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -3808,7 +3808,7 @@ bool ImGui::IsRootWindowOrAnyChildFocused()
 {
     ImGuiState& g = *GImGui;
     ImGuiWindow* root_window = GetCurrentWindow()->RootWindow;
-    return g.FocusedWindow->RootWindow == root_window;
+    return g.FocusedWindow && g.FocusedWindow->RootWindow == root_window;
 }
 
 float ImGui::GetWindowWidth()