diff --git a/imgui.h b/imgui.h
index f2d62c6c..e7bc298f 100644
--- a/imgui.h
+++ b/imgui.h
@@ -165,7 +165,7 @@ namespace ImGui
     IMGUI_API void          EndTooltip();
 
     // Popup
-    IMGUI_API void          OpenPopup(const char* str_id);                                      // mark popup as open. close childs popups if any. will close popup when user click outside, or activate menu items, or CloseCurrentPopup() is called within a BeginPopup/EndPopup block.
+    IMGUI_API void          OpenPopup(const char* str_id);                                      // mark popup as open. popup identifiers are relative to the current ID-stack (so OpenPopup and BeginPopup needs to be at the same level). close childs popups if any. will close popup when user click outside, or activate a pressable item, or CloseCurrentPopup() is called within a BeginPopup()/EndPopup() block.
     IMGUI_API bool          BeginPopup(const char* str_id);                                     // return true if popup if opened and start outputting to it. only call EndPopup() if BeginPopup() returned true!
     IMGUI_API void          EndPopup();
     IMGUI_API void          CloseCurrentPopup();                                                // close the popup we have begin-ed into. clicking on a MenuItem or Selectable automatically close the current popup.