diff --git a/src/option.c b/src/option.c
index 6408e24..646265d 100644
--- a/src/option.c
+++ b/src/option.c
@@ -5679,6 +5679,7 @@
     to->wo_wcr = copy_option_val(from->wo_wcr);
     to->wo_scb = from->wo_scb;
     to->wo_scb_save = from->wo_scb_save;
+    to->wo_sms = from->wo_sms;
     to->wo_crb = from->wo_crb;
     to->wo_crb_save = from->wo_crb_save;
 #ifdef FEAT_SPELL