diff --git a/windows/clipboard.c b/windows/clipboard.c
index dd06c9d3501..a5d1431ca4d 100644
--- a/windows/clipboard.c
+++ b/windows/clipboard.c
@@ -77,6 +77,9 @@ static BOOL bCBHasChanged = FALSE;
 
 /**************************************************************************
  *                      CLIPBOARD_SetClipboardOwner
+ *
+ * Set the global wineserver clipboard owner. The current process will
+ * be the owner and <hWnd> will get the render notifications.
  */
 BOOL CLIPBOARD_SetClipboardOwner(HWND hWnd)
 {