diff --git a/network.cpp b/network.cpp
index 55232d8..62e51d2 100644
--- a/network.cpp
+++ b/network.cpp
@@ -340,5 +340,5 @@ void Connection::update_MTU( void )
     throw NetworkException( "Error getting path MTU", errno );
   }
 
-  MTU = max( PMTU, SEND_MTU );
+  MTU = min( PMTU, SEND_MTU );
 }