diff --git a/imgui.cpp b/imgui.cpp
index bc86d29..83026cf 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -3574,7 +3574,7 @@
         }
 
         // Minimum window size
-        if (!(flags & (ImGuiWindowFlags_ChildWindow | ImGuiWindowFlags_ChildMenu | ImGuiWindowFlags_Tooltip)))
+        if (!(flags & (ImGuiWindowFlags_ChildWindow | ImGuiWindowFlags_Popup | ImGuiWindowFlags_ChildMenu | ImGuiWindowFlags_Tooltip)))
         {
             window->SizeFull = ImMax(window->SizeFull, style.WindowMinSize);
             if (!window->Collapsed)