diff --git a/imgui.cpp b/imgui.cpp
index 8eb666b..2f00e0b 100644
--- a/imgui.cpp
+++ b/imgui.cpp
@@ -5097,7 +5097,7 @@
 
     char title[256];
     if (name)
-        ImFormatString(title, IM_ARRAYSIZE(title), "%s/%s_%08X", parent_window->Name, name, id);
+        ImFormatString(title, IM_ARRAYSIZE(title), "%s/%s", parent_window->Name, name);
     else
         ImFormatString(title, IM_ARRAYSIZE(title), "%s/%08X", parent_window->Name, id);