diff --git a/runtime/doc/debug.txt b/runtime/doc/debug.txt
index a102b85..77c2483 100644
--- a/runtime/doc/debug.txt
+++ b/runtime/doc/debug.txt
@@ -1,4 +1,4 @@
-*debug.txt*     For Vim version 7.4a.  Last change: 2012 Feb 11
+*debug.txt*     For Vim version 7.4b.  Last change: 2012 Feb 11
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar