diff --git a/src/textprop.c b/src/textprop.c
index 83c42a3..fe0c8d2 100644
--- a/src/textprop.c
+++ b/src/textprop.c
@@ -2060,7 +2060,7 @@
  * prop_type_list([{bufnr}])
  */
     void
-f_prop_type_list(typval_T *argvars, typval_T *rettv UNUSED)
+f_prop_type_list(typval_T *argvars, typval_T *rettv)
 {
     buf_T *buf = NULL;