diff --git a/ext/opcache/jit/zend_jit_ir.c b/ext/opcache/jit/zend_jit_ir.c
index e94a86000a0a..8802f3946f51 100644
--- a/ext/opcache/jit/zend_jit_ir.c
+++ b/ext/opcache/jit/zend_jit_ir.c
@@ -3754,6 +3754,10 @@ static void _zend_jit_fix_merges(zend_jit_ctx *jit)
 				if (k != n) {
 					ir_ref n2, k2;
 
+					while (r != q) {
+						*r = IR_UNUSED;
+						r++;
+					}
 					if (k <= 1) {
 						insn->op = IR_BEGIN;
 						insn->inputs_count = 0;
diff --git a/ext/opcache/tests/jit/gh24397.phpt b/ext/opcache/tests/jit/gh24397.phpt
new file mode 100644
index 000000000000..1ef87a66f3da
--- /dev/null
+++ b/ext/opcache/tests/jit/gh24397.phpt
@@ -0,0 +1,23 @@
+--TEST--
+GH-24397 (JIT: stale label operand on a MERGE reduced to BEGIN)
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.file_update_protection=0
+opcache.jit_buffer_size=64M
+opcache.jit=function
+opcache.jit_debug=0x1000000
+--EXTENSIONS--
+opcache
+--FILE--
+<?php
+function f() {
+    foreach ([1, 2] as $v) {
+        $c[] = $v;
+    }
+}
+f();
+echo "Done\n";
+?>
+--EXPECTF--
+%ADone