diff --git a/src/eval.c b/src/eval.c
index 2e2ca23..99768ee 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -1351,7 +1351,8 @@
 	{
 	    typval_T tv;
 
-	    if (flags & (ASSIGN_CONST | ASSIGN_FINAL))
+	    if ((flags & (ASSIGN_CONST | ASSIGN_FINAL))
+					     && (flags & ASSIGN_FOR_LOOP) == 0)
 	    {
 		emsg(_(e_cannot_mod));
 		*endp = cc;
@@ -1390,7 +1391,8 @@
 	listitem_T *ll_li = lp->ll_li;
 	int	    ll_n1 = lp->ll_n1;
 
-	if (flags & (ASSIGN_CONST | ASSIGN_FINAL))
+	if ((flags & (ASSIGN_CONST | ASSIGN_FINAL))
+					     && (flags & ASSIGN_FOR_LOOP) == 0)
 	{
 	    emsg(_("E996: Cannot lock a range"));
 	    return;
@@ -1449,7 +1451,8 @@
 	/*
 	 * Assign to a List or Dictionary item.
 	 */
-	if (flags & (ASSIGN_CONST | ASSIGN_FINAL))
+	if ((flags & (ASSIGN_CONST | ASSIGN_FINAL))
+					     && (flags & ASSIGN_FOR_LOOP) == 0)
 	{
 	    emsg(_("E996: Cannot lock a list or dict"));
 	    return;
@@ -1775,7 +1778,9 @@
 {
     forinfo_T	*fi = (forinfo_T *)fi_void;
     int		result;
-    int		flag = in_vim9script() ? ASSIGN_DECL : 0;
+    int		flag = ASSIGN_FOR_LOOP | (in_vim9script()
+			 ? (ASSIGN_FINAL | ASSIGN_DECL | ASSIGN_NO_MEMBER_TYPE)
+			 : 0);
     listitem_T	*item;
 
     if (fi->fi_blob != NULL)