diff --git a/src/or/config.c b/src/or/config.c
index a0890e2786..b2cb1f407e 100644
--- a/src/or/config.c
+++ b/src/or/config.c
@@ -492,6 +492,8 @@ static config_var_t option_vars_[] = {
   V(TestingSigningKeySlop,           INTERVAL, "1 day"),
 
   V(OptimisticData,              AUTOBOOL, "auto"),
+  OBSOLETE("PortForwarding"),
+  OBSOLETE("PortForwardingHelper"),
   OBSOLETE("PreferTunneledDirConns"),
   V(ProtocolWarnings,            BOOL,     "0"),
   V(PublishServerDescriptor,     CSV,      "1"),