diff --git a/imgui.cpp b/imgui.cpp
index a4322bd..5cc6ca2 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -5511,7 +5511,7 @@
 {
     ImGuiContext& g = *GImGui;
 
-    const bool new_is_explicit_child = (new_flags & ImGuiWindowFlags_ChildWindow) != 0;
+    const bool new_is_explicit_child = (new_flags & ImGuiWindowFlags_ChildWindow) != 0 && ((new_flags & ImGuiWindowFlags_Popup) == 0 || (new_flags & ImGuiWindowFlags_ChildMenu) != 0);
     const bool child_flag_changed = new_is_explicit_child != window->IsExplicitChild;
     if ((just_created || child_flag_changed) && !new_is_explicit_child)
     {
diff --git a/imgui.h b/imgui.h
index 552a5f5..2f15165 100644
--- a/imgui.h
+++ b/imgui.h
@@ -23,7 +23,7 @@
 // Library Version
 // (Integer encoded as XYYZZ for use in #if preprocessor conditionals, e.g. '#if IMGUI_VERSION_NUM > 12345')
 #define IMGUI_VERSION               "1.89 WIP"
-#define IMGUI_VERSION_NUM           18820
+#define IMGUI_VERSION_NUM           18821
 #define IMGUI_HAS_TABLE
 
 /*