diff --git a/sbin/ipfw/ipfw2.c b/sbin/ipfw/ipfw2.c
index 27c6b0a80731..7940e544cf35 100644
--- a/sbin/ipfw/ipfw2.c
+++ b/sbin/ipfw/ipfw2.c
@@ -231,7 +231,7 @@ static struct _s_x rule_action_params[] = {
  */
 static int lookup_key[] = {
 	TOK_DSTIP, TOK_SRCIP, TOK_DSTPORT, TOK_SRCPORT,
-	TOK_UID, TOK_JAIL, -1 };
+	TOK_UID, TOK_JAIL, TOK_DSCP, -1 };
 
 static struct _s_x rule_options[] = {
 	{ "tagged",		TOK_TAGGED },
@@ -258,6 +258,7 @@ static struct _s_x rule_options[] = {
 	{ "iplen",		TOK_IPLEN },
 	{ "ipid",		TOK_IPID },
 	{ "ipprecedence",	TOK_IPPRECEDENCE },
+	{ "dscp",		TOK_DSCP },
 	{ "iptos",		TOK_IPTOS },
 	{ "ipttl",		TOK_IPTTL },
 	{ "ipversion",		TOK_IPVER },
@@ -3519,7 +3520,7 @@ read_options:
 			char *p;
 			int j;
 
-			if (av[0] && av[1])
+			if (!av[0] || !av[1])
 				errx(EX_USAGE, "format: lookup argument tablenum");
 			cmd->opcode = O_IP_DST_LOOKUP;
 			cmd->len |= F_INSN_SIZE(ipfw_insn) + 2;
diff --git a/sbin/ipfw/ipfw2.h b/sbin/ipfw/ipfw2.h
index 1dbb42b767b3..d1729841e97b 100644
--- a/sbin/ipfw/ipfw2.h
+++ b/sbin/ipfw/ipfw2.h
@@ -125,6 +125,7 @@ enum tokens {
 	TOK_IPLEN,
 	TOK_IPID,
 	TOK_IPPRECEDENCE,
+	TOK_DSCP,
 	TOK_IPTOS,
 	TOK_IPTTL,
 	TOK_IPVER,