diff --git a/imgui.cpp b/imgui.cpp
index dcf3ea5ffd06..4fbc1b9e1a6c 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -1743,6 +1743,7 @@ ImGuiWindow::ImGuiWindow(const char* name)
     NavLastId = 0;
     AutoFitFramesX = AutoFitFramesY = -1;
     AutoFitOnlyGrows = false;
+    AutoFitChildAxises = 0x00;
     AutoPosLastDirection = -1;
     HiddenFrames = 0;
     SetWindowPosAllowFlags = SetWindowSizeAllowFlags = SetWindowCollapsedAllowFlags = ImGuiSetCond_Always | ImGuiSetCond_Once | ImGuiSetCond_FirstUseEver | ImGuiSetCond_Appearing;
@@ -4161,18 +4162,11 @@ bool ImGui::BeginChild(const char* str_id, const ImVec2& size_arg, bool border,
 
     const ImVec2 content_avail = GetContentRegionAvail();
     ImVec2 size = ImFloor(size_arg);
+    const int auto_fit_axises = ((size.x == 0.0f) ? 0x01 : 0x00) | ((size.y == 0.0f) ? 0x02 : 0x00);
     if (size.x <= 0.0f)
-    {
-        if (size.x == 0.0f)
-            flags |= ImGuiWindowFlags_ChildWindowAutoFitX;
         size.x = ImMax(content_avail.x, 4.0f) - fabsf(size.x); // Arbitrary minimum zero-ish child size of 4.0f (0.0f causing too much issues)
-    }
     if (size.y <= 0.0f)
-    {
-        if (size.y == 0.0f)
-            flags |= ImGuiWindowFlags_ChildWindowAutoFitY;
         size.y = ImMax(content_avail.y, 4.0f) - fabsf(size.y);
-    }
     if (border)
         flags |= ImGuiWindowFlags_ShowBorders;
     flags |= extra_flags;
@@ -4182,6 +4176,7 @@ bool ImGui::BeginChild(const char* str_id, const ImVec2& size_arg, bool border,
 
     bool ret = ImGui::Begin(title, NULL, size, -1.0f, flags);
     ImGuiWindow* child_window = GetCurrentWindow();
+    child_window->AutoFitChildAxises = auto_fit_axises;
     if (!(parent_window->Flags & ImGuiWindowFlags_ShowBorders))
         child_window->Flags &= ~ImGuiWindowFlags_ShowBorders;
 
@@ -4218,9 +4213,9 @@ void ImGui::EndChild()
     {
         // When using auto-filling child window, we don't provide full width/height to ItemSize so that it doesn't feed back into automatic size-fitting.
         ImVec2 sz = GetWindowSize();
-        if (window->Flags & ImGuiWindowFlags_ChildWindowAutoFitX) // Arbitrary minimum zero-ish child size of 4.0f causes less trouble than a 0.0f
+        if (window->AutoFitChildAxises & 0x01) // Arbitrary minimum zero-ish child size of 4.0f causes less trouble than a 0.0f
             sz.x = ImMax(4.0f, sz.x);
-        if (window->Flags & ImGuiWindowFlags_ChildWindowAutoFitY)
+        if (window->AutoFitChildAxises & 0x02)
             sz.y = ImMax(4.0f, sz.y);
         ImGui::End();
 
diff --git a/imgui.h b/imgui.h
index 6da6cecd21b5..d3719ad739ef 100644
--- a/imgui.h
+++ b/imgui.h
@@ -513,9 +513,7 @@ enum ImGuiWindowFlags_
     ImGuiWindowFlags_NoNavInputs            = 1 << 18,  // No gamepad/keyboard navigation within the window
     ImGuiWindowFlags_NavFlattened           = 1 << 19,  // Allow gamepad/keyboard navigation to cross over parent border to this child (only use on child that have no scrolling!)
     // [Internal]
-    ImGuiWindowFlags_ChildWindow            = 1 << 20,  // Don't use! For internal use by BeginChild()
-    ImGuiWindowFlags_ChildWindowAutoFitX    = 1 << 21,  // Don't use! For internal use by BeginChild()
-    ImGuiWindowFlags_ChildWindowAutoFitY    = 1 << 22,  // Don't use! For internal use by BeginChild()
+    ImGuiWindowFlags_ChildWindow            = 1 << 22,  // Don't use! For internal use by BeginChild()
     ImGuiWindowFlags_ComboBox               = 1 << 23,  // Don't use! For internal use by ComboBox()
     ImGuiWindowFlags_Tooltip                = 1 << 24,  // Don't use! For internal use by BeginTooltip()
     ImGuiWindowFlags_Popup                  = 1 << 25,  // Don't use! For internal use by BeginPopup()
diff --git a/imgui_internal.h b/imgui_internal.h
index 4b192fa1a775..b8d211cad7b2 100644
--- a/imgui_internal.h
+++ b/imgui_internal.h
@@ -700,6 +700,7 @@ struct IMGUI_API ImGuiWindow
     ImGuiID                 NavLastId;                          // Last known NavId for this window, for nav layer 0 only.
     int                     AutoFitFramesX, AutoFitFramesY;
     bool                    AutoFitOnlyGrows;
+    int                     AutoFitChildAxises;
     int                     AutoPosLastDirection;
     int                     HiddenFrames;
     int                     SetWindowPosAllowFlags;             // bit ImGuiSetCond_*** specify if SetWindowPos() call will succeed with this particular flag.