diff --git a/src/Quasar/Network/Multiplexer.hs b/src/Quasar/Network/Multiplexer.hs
index 66f622a3db0e27397fe12a6cdfeaa09938405d30..abc0998c90a4179d69a52e0b4e887e35a67487e5 100644
--- a/src/Quasar/Network/Multiplexer.hs
+++ b/src/Quasar/Network/Multiplexer.hs
@@ -8,6 +8,7 @@ module Quasar.Network.Multiplexer (
   SentMessageResources(..),
   ReceivedMessageResources(..),
   MultiplexerException,
+  ChannelNotConnected,
   channelReportProtocolError,
   channelReportException,
   channelSend,