diff --git a/src/vim9compile.c b/src/vim9compile.c
index 5225345..53c8e5a 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -471,7 +471,7 @@
 {
     type_T	*type = type_arg;
 
-    if (lvar->lv_const && (type->tt_flags & TTFLAG_CONST) == 0)
+    if (lvar->lv_const == ASSIGN_CONST && (type->tt_flags & TTFLAG_CONST) == 0)
     {
 	if (type->tt_flags & TTFLAG_STATIC)
 	    // entry in static_types[] is followed by const type
@@ -487,6 +487,8 @@
 
 /*
  * Reserve space for a local variable.
+ * "assign" can be ASSIGN_VAR for :var, ASSIGN_CONST for :const and
+ * ASSIGN_FINAL for :final.
  * Return the variable or NULL if it failed.
  */
     lvar_T *
@@ -494,7 +496,7 @@
 	cctx_T	*cctx,
 	char_u	*name,
 	size_t	len,
-	int	isConst,
+	int	assign,
 	type_T	*type)
 {
     lvar_T  *lvar;
@@ -519,7 +521,7 @@
     lvar->lv_idx = dfunc->df_var_names.ga_len;
 
     lvar->lv_name = vim_strnsave(name, len == 0 ? STRLEN(name) : len);
-    lvar->lv_const = isConst;
+    lvar->lv_const = assign;
     if (type == &t_unknown || type == &t_any)
 	// type not known yet, may be inferred from RHS
 	lvar->lv_type = type;
@@ -993,7 +995,7 @@
     {
 	// Define a local variable for the function reference.
 	lvar = reserve_local(cctx, func_name, name_end - name_start,
-						    TRUE, ufunc->uf_func_type);
+					    ASSIGN_CONST, ufunc->uf_func_type);
 	if (lvar == NULL)
 	    goto theend;
 	if (generate_FUNCREF(cctx, ufunc, &funcref_isn) == FAIL)
@@ -1691,8 +1693,10 @@
 	    return FAIL;
 
 	// New local variable.
+	int assign = cmdidx == CMD_final ? ASSIGN_FINAL
+			     : cmdidx == CMD_const ? ASSIGN_CONST : ASSIGN_VAR;
 	lhs->lhs_lvar = reserve_local(cctx, var_start, lhs->lhs_varlen,
-		    cmdidx == CMD_final || cmdidx == CMD_const, lhs->lhs_type);
+							assign, lhs->lhs_type);
 	if (lhs->lhs_lvar == NULL)
 	    return FAIL;
 	lhs->lhs_new_local = TRUE;
@@ -1769,7 +1773,8 @@
 	return FAIL;
     }
     if (!is_decl && lhs->lhs_lvar != NULL
-			   && lhs->lhs_lvar->lv_const && !lhs->lhs_has_index)
+			   && lhs->lhs_lvar->lv_const != ASSIGN_VAR
+			   && !lhs->lhs_has_index)
     {
 	semsg(_(e_cannot_assign_to_constant), lhs->lhs_name);
 	return FAIL;