diff --git a/imgui.cpp b/imgui.cpp
index 5e4945e..dada488 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -4987,7 +4987,7 @@
             IM_ASSERT(window_pos_set_by_api);
             float horizontal_overlap = style.ItemSpacing.x; // We want some overlap to convey the relative depth of each popup (currently the amount of overlap it is hard-coded to style.ItemSpacing.x, may need to introduce another style value).
             ImRect rect_to_avoid;
-            if (parent_window && parent_window->DC.MenuBarAppending)
+            if (parent_window->DC.MenuBarAppending)
                 rect_to_avoid = ImRect(-FLT_MAX, parent_window->Pos.y + parent_window->TitleBarHeight(), FLT_MAX, parent_window->Pos.y + parent_window->TitleBarHeight() + parent_window->MenuBarHeight());
             else
                 rect_to_avoid = ImRect(parent_window->Pos.x + horizontal_overlap, -FLT_MAX, parent_window->Pos.x + parent_window->Size.x - horizontal_overlap - parent_window->ScrollbarSizes.x, FLT_MAX);