diff --git a/sbin/ipfw/ipfw.8 b/sbin/ipfw/ipfw.8
index c4ba67701f4e..a30cc35601c7 100644
--- a/sbin/ipfw/ipfw.8
+++ b/sbin/ipfw/ipfw.8
@@ -1159,11 +1159,11 @@ Supported values are:
 .Pq Dv 101110 ,
 .Cm be
 .Pq Dv 000000 .
-Additionally, DSCP value can be specified by number (0..64).
+Additionally, DSCP value can be specified by number (0..63).
 It is also possible to use the
 .Cm tablearg
 keyword with setdscp.
-If the tablearg value is not within the 0..64 range, lower 6 bits of supplied
+If the tablearg value is not within the 0..63 range, lower 6 bits of supplied
 value are used.
 .It Cm tcp-setmss Ar mss
 Set the Maximum Segment Size (MSS) in the TCP segment to value