diff --git a/daemon/face/udp-channel.cpp b/daemon/face/udp-channel.cpp
index 6497c30..b9da25e 100644
--- a/daemon/face/udp-channel.cpp
+++ b/daemon/face/udp-channel.cpp
@@ -169,7 +169,7 @@
     options.allowCongestionMarking = m_wantCongestionMarking;
   }
   else {
-    options.allowCongestionMarking = params.wantCongestionMarking;
+    options.allowCongestionMarking = bool(params.wantCongestionMarking);
   }
 
   if (params.baseCongestionMarkingInterval) {