diff --git a/imgui.cpp b/imgui.cpp
index fbe0592..f0208b7 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -3510,7 +3510,7 @@
         }
 
         // Minimum window size
-        if (!(flags & ImGuiWindowFlags_ChildWindow) && !(flags & ImGuiWindowFlags_Tooltip))
+        if (!(flags & (ImGuiWindowFlags_ChildWindow | ImGuiWindowFlags_ChildMenu | ImGuiWindowFlags_Tooltip)))
         {
             window->SizeFull = ImMax(window->SizeFull, style.WindowMinSize);
             if (!window->Collapsed)