diff --git a/ext/intl/msgformat/msgformat_helpers.cpp b/ext/intl/msgformat/msgformat_helpers.cpp
index 730a445577994..c1853c0340fe5 100644
--- a/ext/intl/msgformat/msgformat_helpers.cpp
+++ b/ext/intl/msgformat/msgformat_helpers.cpp
@@ -392,6 +392,7 @@ U_CFUNC void umsg_format_helper(MessageFormatter_object *mfo,
 	zend_ulong		 num_index;
 
 	ZEND_HASH_FOREACH_KEY_VAL(args, num_index, str_index, elem) {
+		ZVAL_DEREF(elem);
 		Formattable& formattable = fargs[argNum];
 		UnicodeString& key = farg_names[argNum];
 		Formattable::Type argType = Formattable::kObject, //unknown
diff --git a/ext/intl/tests/gh8364.phpt b/ext/intl/tests/gh8364.phpt
new file mode 100644
index 0000000000000..74a0b5629ec9c
--- /dev/null
+++ b/ext/intl/tests/gh8364.phpt
@@ -0,0 +1,20 @@
+--TEST--
+Bug GH-8364 (msgfmt_format $values may not support references)
+--SKIPIF--
+<?php
+if (!extension_loaded("intl")) die("skip intl extension not available");
+?>
+--FILE--
+<?php
+$formatter = new MessageFormatter('en', 'translate {0}');
+$args = ['string', 'string'];
+foreach ($args as &$arg) {
+//     do nothing;
+}
+$result = $formatter->format($args);
+var_dump($result);
+var_dump(intl_get_error_code());
+?>
+--EXPECT--
+string(16) "translate string"
+int(0)