diff --git a/auth/jwt/middleware.go b/auth/jwt/middleware.go
index ff44ed7..c07d6e9 100644
--- a/auth/jwt/middleware.go
+++ b/auth/jwt/middleware.go
@@ -66,6 +66,8 @@
 	}
 }
 
+// ClaimsFactory is a factory for jwt.Claims.
+// Useful in NewParser middleware.
 type ClaimsFactory func() jwt.Claims
 
 // MapClaimsFactory is a ClaimsFactory that returns