diff --git a/doc/sudoers.pod b/doc/sudoers.pod
index 772d7b18c..f538e7a74 100644
--- a/doc/sudoers.pod
+++ b/doc/sudoers.pod
@@ -1369,6 +1369,7 @@ as I<env_keep> and I<env_check>.
 =item exempt_group
 
 Users in this group are exempt from password and PATH requirements.
+The group name specified should not include a C<%> prefix.
 This is not set by default.
 
 =item group_plugin