diff --git a/common/cmd_mac.c b/common/cmd_mac.c
index cf601e4..20403da 100644
--- a/common/cmd_mac.c
+++ b/common/cmd_mac.c
@@ -44,20 +44,6 @@
 	"    - program date\n"
 	"mac ports\n"
 	"    - program the number of ports\n"
-	"mac 0\n"
-	"    - program the MAC address for port 0\n"
-	"mac 1\n"
-	"    - program the MAC address for port 1\n"
-	"mac 2\n"
-	"    - program the MAC address for port 2\n"
-	"mac 3\n"
-	"    - program the MAC address for port 3\n"
-	"mac 4\n"
-	"    - program the MAC address for port 4\n"
-	"mac 5\n"
-	"    - program the MAC address for port 5\n"
-	"mac 6\n"
-	"    - program the MAC address for port 6\n"
-	"mac 7\n"
-	"    - program the MAC address for port 7\n"
+	"mac X\n"
+	"    - program the MAC address for port X [X=0...7]"
 );