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diff --git a/share/man/man9/ucred.9 b/share/man/man9/ucred.9
--- a/share/man/man9/ucred.9
+++ b/share/man/man9/ucred.9
@@ -24,7 +24,7 @@
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
.\" DAMAGE.
.\"
-.Dd July 29, 2025
+.Dd August 29, 2025
.Dt UCRED 9
.Os
.Sh NAME
@@ -113,28 +113,26 @@
.Pp
The
.Fn crsetgroups
-and
-.Fn crsetgroups_and_egid
-functions set the
+function sets the
.Va cr_groups
and
.Va cr_ngroups
-variables and allocates space as needed.
-They also truncate the group list to the current maximum number of
-groups.
+variables representing the supplementary groups, allocating space as needed.
+It also truncates the group list to the current maximum number of groups.
+The
+.Fn crsetgroups_and_egid
+function is similar, but interprets separately the first group of
+.Va groups
+as the effective GID to set, only setting the subsequent groups as supplementary
+ones.
+It will use
+.Va default_egid
+as the new effective GID if
+.Va groups
+is empty.
No other mechanism should be used to modify the
.Va cr_groups
array.
-Note that
-.Fn crsetgroups_and_egid
-will interpret the first element of
-.Va groups
-as the new effective GID and the rest of the array as the supplementary groups,
-and
-.Va default_egid
-will be used as the new effective GID only if
-.Va groups
-is empty.
.Pp
The
.Fn cru2x

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