diff --git a/src/github.com/matrix-org/dendrite/federationsender/types/types.go b/src/github.com/matrix-org/dendrite/federationsender/types/types.go
index 47b58ddf9..05ba92f77 100644
--- a/src/github.com/matrix-org/dendrite/federationsender/types/types.go
+++ b/src/github.com/matrix-org/dendrite/federationsender/types/types.go
@@ -29,7 +29,7 @@ type JoinedHost struct {
 }
 
 // A EventIDMismatchError indicates that we have got out of sync with the
-// rooms server.
+// room server.
 type EventIDMismatchError struct {
 	// The event ID we have stored in our local database.
 	DatabaseID string