diff --git a/src/network/bearer/qnetworkconfiguration.cpp b/src/network/bearer/qnetworkconfiguration.cpp
index 3367de80c8..e36903fc94 100644
--- a/src/network/bearer/qnetworkconfiguration.cpp
+++ b/src/network/bearer/qnetworkconfiguration.cpp
@@ -347,6 +347,8 @@ int QNetworkConfiguration::connectTimeout() const
     This allows control of the timeout used by \c QAbstractSocket
     to establish a connection.
 
+    \note \a timeout is in millisecond.
+
     \warning This will have no effect if the bearer plugin doesn't have
     the CanStartAndStopInterfaces capability.