diff --git a/src/vim9class.c b/src/vim9class.c
index 70f2405..d8813c6 100644
--- a/src/vim9class.c
+++ b/src/vim9class.c
@@ -2665,7 +2665,7 @@
  * Handle ":type".  Create an alias for a type specification.
  */
     void
-ex_type(exarg_T *eap UNUSED)
+ex_type(exarg_T *eap)
 {
     char_u	*arg = eap->arg;