diff --git a/src/option.c b/src/option.c
index 03274a4..91ea413 100644
--- a/src/option.c
+++ b/src/option.c
@@ -5604,7 +5604,7 @@
  * After copying window options: update variables depending on options.
  */
     void
-after_copy_winopt(win_T *wp UNUSED)
+after_copy_winopt(win_T *wp)
 {
 #ifdef FEAT_LINEBREAK
     briopt_check(wp);