diff --git a/programs/winhlp32/winhelp.c b/programs/winhlp32/winhelp.c
index d65a752c308..d3f4d1405a5 100644
--- a/programs/winhlp32/winhelp.c
+++ b/programs/winhlp32/winhelp.c
@@ -1572,12 +1572,6 @@ struct index_data
 /**************************************************************************
  * WINHELP_IndexDlgProc
  *
- * Index dialog callback function.
- *
- * nResult passed to EndDialog:
- *   1: CANCEL button
- *  >1: valid offset value +2.
- *  EndDialog itself can return 0 (error).
  */
 INT_PTR CALLBACK WINHELP_IndexDlgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {