1 files changed, 1 insertions, 0 deletions
diff --git a/err.go b/err.go
index 859c567..4597b3f 100644
--- a/err.go
+++ b/err.go
@@ -46,4 +46,5 @@ var (
 	errCannotReceiveMessage       = errors.New("cannot receive message")
 	errNoSuchCourse               = errors.New("no such course")
 	errInvalidState               = errors.New("invalid state")
+	errWebSocketWrite             = errors.New("error writing to websocket")
 )