diff --git a/doc/sample.config b/doc/sample.config
index a2fd3ecd..c3a486f7 100644
--- a/doc/sample.config
+++ b/doc/sample.config
@@ -43,8 +43,8 @@ auth = "plain[passwd=./sample.passwd]"
 # Specify alternative authentication methods that are sufficient
 # for authentication. That is, if set, any of the methods enabled
 # will be sufficient to login.
-#enable-auth = certificate
-#enable-auth = gssapi
+#enable-auth = "certificate"
+#enable-auth = "gssapi"
 #enable-auth = "gssapi[keytab=/etc/key.tab,require-local-user-map=true,tgt-freshness-time=900]"
 
 # Accounting methods available:
diff --git a/src/ocserv-args.def b/src/ocserv-args.def
index 04a59e70..90e5cf0f 100644
--- a/src/ocserv-args.def
+++ b/src/ocserv-args.def
@@ -125,8 +125,8 @@ An example configuration file follows.
 # Specify alternative authentication methods that are sufficient
 # for authentication. That is, if set, any of the methods enabled
 # will be sufficient to login.
-#enable-auth = certificate
-#enable-auth = gssapi
+#enable-auth = "certificate"
+#enable-auth = "gssapi"
 #enable-auth = "gssapi[keytab=/etc/key.tab,require-local-user-map=true,tgt-freshness-time=900]"
 
 # Accounting methods available: