diff --git a/imgui.cpp b/imgui.cpp
index c3bb973e..7c6011d4 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -1776,7 +1776,7 @@ ImGuiWindow::ImGuiWindow(const char* name)
     MoveId = GetID("#MOVE");
 
     Flags = 0;
-    IndexWithinParent = 0;
+    OrderWithinParent = 0;
     PosFloat = Pos = ImVec2(0.0f, 0.0f);
     Size = SizeFull = ImVec2(0.0f, 0.0f);
     SizeContents = SizeContentsExplicit = ImVec2(0.0f, 0.0f);
@@ -2568,7 +2568,7 @@ static int ChildWindowComparer(const void* lhs, const void* rhs)
         return d;
     if (int d = (a->Flags & ImGuiWindowFlags_ComboBox) - (b->Flags & ImGuiWindowFlags_ComboBox))
         return d;
-    return (a->IndexWithinParent - b->IndexWithinParent);
+    return (a->OrderWithinParent - b->OrderWithinParent);
 }
 
 static void AddWindowToSortedBuffer(ImVector<ImGuiWindow*>& out_sorted_windows, ImGuiWindow* window)
@@ -3991,7 +3991,7 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
     if (first_begin_of_the_frame)
     {
         window->Active = true;
-        window->IndexWithinParent = 0;
+        window->OrderWithinParent = 0;
         window->BeginCount = 0;
         window->ClipRect = ImVec4(-FLT_MAX,-FLT_MAX,+FLT_MAX,+FLT_MAX);
         window->LastFrameActive = current_frame;
@@ -4111,7 +4111,7 @@ bool ImGui::Begin(const char* name, bool* p_open, const ImVec2& size_on_first_us
         // Position child window
         if (flags & ImGuiWindowFlags_ChildWindow)
         {
-            window->IndexWithinParent = parent_window->DC.ChildWindows.Size;
+            window->OrderWithinParent = parent_window->DC.ChildWindows.Size;
             parent_window->DC.ChildWindows.push_back(window);
         }
         if ((flags & ImGuiWindowFlags_ChildWindow) && !(flags & ImGuiWindowFlags_Popup))
diff --git a/imgui_internal.h b/imgui_internal.h
index f936f723..ce91dff4 100644
--- a/imgui_internal.h
+++ b/imgui_internal.h
@@ -620,7 +620,7 @@ struct IMGUI_API ImGuiWindow
     char*                   Name;
     ImGuiID                 ID;                                 // == ImHash(Name)
     ImGuiWindowFlags        Flags;                              // See enum ImGuiWindowFlags_
-    int                     IndexWithinParent;                  // Order within immediate parent window, if we are a child window. Otherwise 0.
+    int                     OrderWithinParent;                  // Order within immediate parent window, if we are a child window. Otherwise 0.
     ImVec2                  PosFloat;
     ImVec2                  Pos;                                // Position rounded-up to nearest pixel
     ImVec2                  Size;                               // Current size (==SizeFull or collapsed title bar size)