diff --git a/imgui_widgets.cpp b/imgui_widgets.cpp
index ae876e562..ca05896ed 100644
--- a/imgui_widgets.cpp
+++ b/imgui_widgets.cpp
@@ -11056,14 +11056,14 @@ void ImGui::TabItemBackground(ImDrawList* draw_list, const ImRect& bb, ImGuiTabI
     const float rounding = ImMax(0.0f, ImMin((flags & ImGuiTabItemFlags_Button) ? g.Style.FrameRounding : g.Style.TabRounding, width * 0.5f - 1.0f));
     const float y1 = bb.Min.y + 1.0f; // Leave a bit of room in title bars.
     const float y2 = bb.Max.y - g.Style.TabBarBorderSize;
-    draw_list->AddRectFilled(bb.Min, ImVec2(bb.Max.x, y2), col, rounding, ImDrawFlags_RoundCornersTop);
+    draw_list->AddRectFilled(ImVec2(bb.Min.x, y1), ImVec2(bb.Max.x, y2), col, rounding, ImDrawFlags_RoundCornersTop);
     if (g.Style.TabBorderSize > 0.0f)
     {
-        draw_list->PathLineTo(ImVec2(bb.Min.x + 0.5f, y2));
-        draw_list->PathArcToFast(ImVec2(bb.Min.x + rounding + 0.5f, y1 + rounding + 0.5f), rounding, 6, 9);
-        draw_list->PathArcToFast(ImVec2(bb.Max.x - rounding - 0.5f, y1 + rounding + 0.5f), rounding, 9, 12);
-        draw_list->PathLineTo(ImVec2(bb.Max.x - 0.5f, y2));
-        draw_list->PathStroke(GetColorU32(ImGuiCol_Border), g.Style.TabBorderSize);
+        draw_list->PathLineTo(ImVec2(bb.Min.x, y2));
+        draw_list->PathArcToFast(ImVec2(bb.Min.x + rounding, y1 + rounding), rounding, 6, 9);
+        draw_list->PathArcToFast(ImVec2(bb.Max.x - rounding, y1 + rounding), rounding, 9, 12);
+        draw_list->PathLineTo(ImVec2(bb.Max.x, y2));
+        draw_list->PathStroke(GetColorU32(ImGuiCol_Border), g.Style.TabBorderSize, ImDrawFlags_StrokeCenterBiased); // Use _StrokeInside?
     }
 }