diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 71ffcb6ec5a..0a19b2fc085 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2007-08-13  Michael Snyder  <msnyder@access-company.com>
+
+	* source.c (find_source_lines): Require symtab 's'.
+
 2007-08-11  Michael Snyder  <msnyder@access-company.com>
 
 	* completer.c: Spelling fix in comments.
diff --git a/gdb/source.c b/gdb/source.c
index 1067e62a8fd..3f6d78154b8 100644
--- a/gdb/source.c
+++ b/gdb/source.c
@@ -1122,11 +1122,12 @@ find_source_lines (struct symtab *s, int desc)
   long mtime = 0;
   int size;
 
+  gdb_assert (s);
   line_charpos = (int *) xmalloc (lines_allocated * sizeof (int));
   if (fstat (desc, &st) < 0)
     perror_with_name (s->filename);
 
-  if (s && s->objfile && s->objfile->obfd)
+  if (s->objfile && s->objfile->obfd)
     mtime = bfd_get_mtime (s->objfile->obfd);
   else if (exec_bfd)
     mtime = bfd_get_mtime (exec_bfd);