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));
     }