diff --git a/runtime/doc/sign.txt b/runtime/doc/sign.txt
index fcc6435..66063f1 100644
--- a/runtime/doc/sign.txt
+++ b/runtime/doc/sign.txt
@@ -1,4 +1,4 @@
-*sign.txt*      For Vim version 7.4.  Last change: 2016 Aug 12
+*sign.txt*      For Vim version 7.4.  Last change: 2016 Aug 17
 
 
 		  VIM REFERENCE MANUAL    by Gordon Prieur
@@ -197,7 +197,9 @@
 		If the file isn't displayed in window and the current file can
 		not be |abandon|ed this fails.
 
-:sign jump {id} buffer={nr}
-		Same, but use buffer {nr}.
+:sign jump {id} buffer={nr}					*E934*
+		Same, but use buffer {nr}.  This fails if buffer {nr} does not
+		have a name.
+
 
  vim:tw=78:ts=8:ft=help:norl: