diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 94c7148a4e5..69fb886bcce 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2001-12-27  Mark Kettenis  <kettenis@gnu.org>
+
+	* maint.c (match_substring): Make parameters `string' and `substr'
+	const.  Make local variable `tok' const.
+
 2001-12-27  Mark Kettenis  <kettenis@gnu.org>
 
 	* config/i386/tm-i386.h (FP7_REGNUM, FIRST_FPU_CTRL_REGNUM,
diff --git a/gdb/maint.c b/gdb/maint.c
index 3e1b63f6765..2f85801fd92 100644
--- a/gdb/maint.c
+++ b/gdb/maint.c
@@ -189,10 +189,10 @@ maintenance_info_command (char *arg, int from_tty)
 /* Mini tokenizing lexer for 'maint info sections' command.  */
 
 static int
-match_substring (char *string, char *substr)
+match_substring (const char *string, const char *substr)
 {
   int substr_len = strlen(substr);
-  char *tok;
+  const char *tok;
 
   while ((tok = strstr (string, substr)) != NULL)
     {