diff --git a/ext/opcache/Optimizer/zend_optimizer.c b/ext/opcache/Optimizer/zend_optimizer.c
index 62409e6530f..1941a56dfaa 100644
--- a/ext/opcache/Optimizer/zend_optimizer.c
+++ b/ext/opcache/Optimizer/zend_optimizer.c
@@ -250,6 +250,7 @@ void zend_optimizer_update_op2_const(zend_op_array *op_array,
 			case ZEND_ISSET_ISEMPTY_DIM_OBJ:
 			case ZEND_ADD_ARRAY_ELEMENT:
 			case ZEND_INIT_ARRAY:
+			case ZEND_ASSIGN_DIM:
 			case ZEND_UNSET_DIM:
 			case ZEND_FETCH_DIM_R:
 			case ZEND_FETCH_DIM_W:
diff --git a/ext/opcache/tests/bug69125.phpt b/ext/opcache/tests/bug69125.phpt
new file mode 100644
index 00000000000..913be01b00f
--- /dev/null
+++ b/ext/opcache/tests/bug69125.phpt
@@ -0,0 +1,22 @@
+--TEST--
+Bug #69125 (Array numeric string as key)
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+--SKIPIF--
+<?php require_once('skipif.inc'); ?>
+--FILE--
+<?php
+
+const SZERO = '0';
+const SONE = '1';
+
+$array[SZERO] = "okey";
+$array[1] = "okey";
+
+var_dump($array[SZERO]);
+var_dump($array[SONE]);
+?>
+--EXPECT--
+string(4) "okey"
+string(4) "okey"