diff --git a/usr.bin/newgrp/newgrp.1 b/usr.bin/newgrp/newgrp.1
index 3e4325783e6d..1b3564c58dfc 100644
--- a/usr.bin/newgrp/newgrp.1
+++ b/usr.bin/newgrp/newgrp.1
@@ -60,7 +60,7 @@ those from the current user's password database entry.
 .Sh DIAGNOSTICS
 The
 .Nm
-utility attempts to start the shell regardless of whether group ID's
+utility attempts to start the shell regardless of whether group IDs
 were successfully changed.
 .Pp
 If an error occurs and the shell cannot be started,