diff --git a/imgui_demo.cpp b/imgui_demo.cpp
index d86606d..d5708bc 100644
--- a/imgui_demo.cpp
+++ b/imgui_demo.cpp
@@ -3863,6 +3863,7 @@
         if (adding_preview)
             points.pop_back();
     }
+    ImGui::End();
 }
 
 //-----------------------------------------------------------------------------