diff --git a/sshd.c b/sshd.c
--- a/sshd.c
+++ b/sshd.c
@@ -1701,6 +1701,10 @@ main(int ac, char **av)
 	parse_server_config(&options, rexeced_flag ? "rexec" : config_file_name,
 	    cfg, NULL);
 
+	/* 'UsePAM no' is not supported in RHEL */
+	if (! options.use_pam)
+		logit("WARNING: 'UsePAM no' is not supported in RHEL and may cause several problems.");
+
 	/* Fill in default values for those options not explicitly set. */
 	fill_default_server_options(&options);
 
diff --git a/sshd_config b/sshd_config
--- a/sshd_config
+++ b/sshd_config
@@ -101,6 +101,8 @@ GSSAPICleanupCredentials no
 # If you just want the PAM account and session checks to run without
 # PAM authentication, then enable this but set PasswordAuthentication
 # and ChallengeResponseAuthentication to 'no'.
+# WARNING: 'UsePAM no' is not supported in RHEL and may cause several
+# problems.
 UsePAM yes
 
 #AllowAgentForwarding yes