diff --git a/src/list.c b/src/list.c
index 1a82a34077..e75a2a7413 100644
--- a/src/list.c
+++ b/src/list.c
@@ -867,6 +867,7 @@ list_concat(list_T *l1, list_T *l2, typval_T *tv)
     if (l == NULL)
 	return FAIL;
     tv->v_type = VAR_LIST;
+    tv->v_lock = 0;
     tv->vval.v_list = l;
     if (l1 == NULL)
 	++l->lv_refcount;
diff --git a/src/version.c b/src/version.c
index 80253553ef..95a0f8ca3e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2027,
 /**/
     2026,
 /**/