diff --git a/sbin/ipfw/ipfw.8 b/sbin/ipfw/ipfw.8
index d7d0f0adfac9..42656869eeb9 100644
--- a/sbin/ipfw/ipfw.8
+++ b/sbin/ipfw/ipfw.8
@@ -788,7 +788,7 @@ Matches all addresses with base
 and the mask of
 .Ar mask ,
 specified as a dotted quad.
-As an example, 1.2.3.4/255.0.255.0 will match
+As an example, 1.2.3.4:255.0.255.0 will match
 1.*.3.*.
 This form is advised only for non-contiguous
 masks. It is better to resort to the