diff --git a/client.conf.sample b/client.conf.sample
index 6cde2eb..7e31b04 100644
--- a/client.conf.sample
+++ b/client.conf.sample
@@ -1,7 +1,7 @@
 ; "unix_socket" specifies the location of the NFD unix socket
 unix_socket=/var/run/nfd.sock
 
-; "protocol" deteremines the protocol for prefix registration
+; "protocol" determines the protocol for prefix registration
 ; it has a value of:
 ;   nfd-0.1
 ;   nrd-0.1
diff --git a/src/face.cpp b/src/face.cpp
index 2773f07..a8b59e9 100644
--- a/src/face.cpp
+++ b/src/face.cpp
@@ -90,7 +90,7 @@
     {
       m_fwController = make_shared<nrd::Controller>(boost::ref(*this));
     }
-  if (isSupportedNfdProtocol(protocol))
+  else if (isSupportedNfdProtocol(protocol))
     {
       m_fwController = make_shared<nfd::Controller>(boost::ref(*this));
     }