diff --git a/compile.c b/compile.c
index 8c295de00c..f53f3c1cec 100644
--- a/compile.c
+++ b/compile.c
@@ -5671,8 +5671,7 @@ iseq_compile_each0(rb_iseq_t *iseq, LINK_ANCHOR *const ret, const NODE *node, in
 	    node->nd_args == NULL &&
 	    ISEQ_COMPILE_DATA(iseq)->current_block == NULL &&
 	    ISEQ_COMPILE_DATA(iseq)->option->specialized_instruction) {
-	    VALUE str = rb_fstring(node->nd_recv->nd_lit);
-	    iseq_add_mark_object(iseq, str);
+	    VALUE str = freeze_literal(iseq, node->nd_recv->nd_lit);
 	    if (node->nd_mid == idUMinus) {
 		ADD_INSN1(ret, line, opt_str_uminus, str);
 	    }
@@ -5692,8 +5691,7 @@ iseq_compile_each0(rb_iseq_t *iseq, LINK_ANCHOR *const ret, const NODE *node, in
 	    nd_type(node->nd_args->nd_head) == NODE_STR &&
 	    ISEQ_COMPILE_DATA(iseq)->current_block == NULL &&
 	    ISEQ_COMPILE_DATA(iseq)->option->specialized_instruction) {
-	    VALUE str = rb_fstring(node->nd_args->nd_head->nd_lit);
-	    node->nd_args->nd_head->nd_lit = str;
+	    VALUE str = freeze_literal(iseq, node->nd_args->nd_head->nd_lit);
 	    CHECK(COMPILE(ret, "recv", node->nd_recv));
 	    ADD_INSN3(ret, line, opt_aref_with,
 		      new_callinfo(iseq, idAREF, 1, 0, NULL, FALSE),
@@ -6743,9 +6741,7 @@ iseq_compile_each0(rb_iseq_t *iseq, LINK_ANCHOR *const ret, const NODE *node, in
 	    ISEQ_COMPILE_DATA(iseq)->current_block == NULL &&
 	    ISEQ_COMPILE_DATA(iseq)->option->specialized_instruction)
 	{
-	    VALUE str = rb_fstring(node->nd_args->nd_head->nd_lit);
-	    node->nd_args->nd_head->nd_lit = str;
-	    iseq_add_mark_object(iseq, str);
+	    VALUE str = freeze_literal(iseq, node->nd_args->nd_head->nd_lit);
 	    CHECK(COMPILE(ret, "recv", node->nd_recv));
 	    CHECK(COMPILE(ret, "value", node->nd_args->nd_next->nd_head));
 	    if (!popped) {