diff --git a/glass/src/lib/native/include/glass/WindowManager.h b/glass/src/lib/native/include/glass/WindowManager.h
index 0ccace2d68..02e680dd37 100644
--- a/glass/src/lib/native/include/glass/WindowManager.h
+++ b/glass/src/lib/native/include/glass/WindowManager.h
@@ -121,6 +121,11 @@ class WindowManager {
    */
   void EraseWindows() { m_windows.clear(); }
 
+  /**
+   * Get window count.
+   */
+  size_t GetNumWindows() const { return m_windows.size(); }
+
  protected:
   /**
    * Removes existing window (by index)
diff --git a/simulation/halsim_gui/src/main/native/cpp/main.cpp b/simulation/halsim_gui/src/main/native/cpp/main.cpp
index 21fe17404f..de3eae4bab 100644
--- a/simulation/halsim_gui/src/main/native/cpp/main.cpp
+++ b/simulation/halsim_gui/src/main/native/cpp/main.cpp
@@ -148,7 +148,7 @@ __declspec(dllexport)
       gPlotProvider->DisplayMenu();
       ImGui::EndMenu();
     }
-    if (ImGui::BeginMenu("Window")) {
+    if (HALSimGui::manager->GetNumWindows() > 0 && ImGui::BeginMenu("Window")) {
       HALSimGui::manager->DisplayMenu();
       ImGui::EndMenu();
     }