diff --git a/ripngd/ripngd.c b/ripngd/ripngd.c
index d416255..8e97c2f 100644
--- a/ripngd/ripngd.c
+++ b/ripngd/ripngd.c
@@ -2485,28 +2485,10 @@
   unsigned long update;
   unsigned long timeout;
   unsigned long garbage;
-  char *endptr = NULL;
 
-  update = strtoul (argv[0], &endptr, 10);
-  if (update == ULONG_MAX || *endptr != '\0')
-    {
-      vty_out (vty, "update timer value error%s", VTY_NEWLINE);
-      return CMD_WARNING;
-    }
-  
-  timeout = strtoul (argv[1], &endptr, 10);
-  if (timeout == ULONG_MAX || *endptr != '\0')
-    {
-      vty_out (vty, "timeout timer value error%s", VTY_NEWLINE);
-      return CMD_WARNING;
-    }
-  
-  garbage = strtoul (argv[2], &endptr, 10);
-  if (garbage == ULONG_MAX || *endptr != '\0')
-    {
-      vty_out (vty, "garbage timer value error%s", VTY_NEWLINE);
-      return CMD_WARNING;
-    }
+  VTY_GET_INTEGER_RANGE("update timer", update, argv[0], 0, 65535);
+  VTY_GET_INTEGER_RANGE("timeout timer", timeout, argv[1], 0, 65535);
+  VTY_GET_INTEGER_RANGE("garbage timer", garbage, argv[2], 0, 65535);
 
   /* Set each timer value. */
   ripng->update_time = update;