diff --git a/usr.bin/su/su.1 b/usr.bin/su/su.1
index 7919d52fa91c..d041d6cdf2a1 100644
--- a/usr.bin/su/su.1
+++ b/usr.bin/su/su.1
@@ -70,7 +70,7 @@ The invoked shell is the one belonging to the target login.
 This is the traditional behavior of
 .Nm .
 Resource limits and session priority applicable to the original user's
-login class (See
+login class (see
 .Xr login.conf 5 )
 are also normally retained unless the target login has a user ID of 0.
 .Pp