diff --git a/NEWS b/NEWS
index 8c9cf74b12c..ab4772659e9 100644
--- a/NEWS
+++ b/NEWS
@@ -25,6 +25,8 @@
   . Fixed bug #68964 (Allowed memory size exhausted with odbc_exec). (Anatol)
 
 - Opcache:
+  . Fixed bug #69159 (Opcache causes problem when passing a variable variable 
+    to a function). (Dmitry, Laruence)
   . Fixed bug #69125 (Array numeric string as key). (Laruence)
   . Fixed bug #69038 (switch(SOMECONSTANT) misbehaves). (Laruence)
 
diff --git a/ext/opcache/Optimizer/optimize_func_calls.c b/ext/opcache/Optimizer/optimize_func_calls.c
index 14f82556537..886021ce977 100644
--- a/ext/opcache/Optimizer/optimize_func_calls.c
+++ b/ext/opcache/Optimizer/optimize_func_calls.c
@@ -82,10 +82,10 @@ static void optimize_func_calls(zend_op_array *op_array, zend_persistent_script
 			case ZEND_FETCH_DIM_FUNC_ARG:
 				if (call_stack[call - 1].func) {
 					if (ARG_SHOULD_BE_SENT_BY_REF(call_stack[call - 1].func, (opline->extended_value & ZEND_FETCH_ARG_MASK))) {
-						opline->extended_value = 0;
+						opline->extended_value &= ZEND_FETCH_TYPE_MASK;
 						opline->opcode -= 9;
 					} else {
-						opline->extended_value = 0;
+						opline->extended_value &= ZEND_FETCH_TYPE_MASK;
 						opline->opcode -= 12;
 					}
 				}
diff --git a/ext/opcache/tests/bug69159.phpt b/ext/opcache/tests/bug69159.phpt
new file mode 100644
index 00000000000..d8b953a1aa9
--- /dev/null
+++ b/ext/opcache/tests/bug69159.phpt
@@ -0,0 +1,20 @@
+--TEST--
+Bug #69159 (Opcache causes problem when passing a variable variable to a function)
+--INI--
+opcache.enable=1
+opcache.optimization_level=-1
+--SKIPIF--
+<?php require_once('skipif.inc'); ?>
+--FILE--
+<?php
+$i = 1;
+$x1 = "okey";
+myFunction(${"x$i"});
+
+function myFunction($x) {
+	var_dump($x);
+}
+
+?>
+--EXPECT--
+string(4) "okey"