diff --git a/ext/intl/dateformat/dateformat.stub.php b/ext/intl/dateformat/dateformat.stub.php
index e6f9522dd4e31..36f77771d9090 100644
--- a/ext/intl/dateformat/dateformat.stub.php
+++ b/ext/intl/dateformat/dateformat.stub.php
@@ -104,7 +104,7 @@ public function isLenient() {}
     public function format($datetime) {}
 
     /**
-     * @param IntlCalendar|DateTime $datetime
+     * @param IntlCalendar|DateTimeInterface $datetime
      * @param array|int|string|null $format
      * @return string|false
      * @alias datefmt_format_object
diff --git a/ext/intl/dateformat/dateformat_arginfo.h b/ext/intl/dateformat/dateformat_arginfo.h
index 8830fa615e801..63a50733d86bd 100644
--- a/ext/intl/dateformat/dateformat_arginfo.h
+++ b/ext/intl/dateformat/dateformat_arginfo.h
@@ -1,5 +1,5 @@
 /* This is a generated file, edit the .stub.php file instead.
- * Stub hash: faeef90c9c1324c6a25f0df36c7239ddc2b43ee4 */
+ * Stub hash: 425a285b704e175ccd0313fe1be85c8abaf820b7 */
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_class_IntlDateFormatter___construct, 0, 0, 3)
 	ZEND_ARG_TYPE_INFO(0, locale, IS_STRING, 1)
diff --git a/ext/intl/dateformat/dateformat_format_object.cpp b/ext/intl/dateformat/dateformat_format_object.cpp
index d569eb935d26b..c979dcce8f746 100644
--- a/ext/intl/dateformat/dateformat_format_object.cpp
+++ b/ext/intl/dateformat/dateformat_format_object.cpp
@@ -190,7 +190,7 @@ U_CFUNC PHP_FUNCTION(datefmt_format_object)
 		}
 	} else {
 		intl_error_set(NULL, status, "datefmt_format_object: the passed object "
-				"must be an instance of either IntlCalendar or DateTime",
+				"must be an instance of either IntlCalendar or DateTimeInterface",
 				0);
 		RETURN_FALSE;
 	}
diff --git a/ext/intl/tests/dateformat_formatObject_error.phpt b/ext/intl/tests/dateformat_formatObject_error.phpt
index 29a8798e799ed..dcb5506c4d8a8 100644
--- a/ext/intl/tests/dateformat_formatObject_error.phpt
+++ b/ext/intl/tests/dateformat_formatObject_error.phpt
@@ -31,7 +31,7 @@ var_dump(IntlDateFormatter::formatObject($cal, ""));
 
 ?>
 --EXPECTF--
-Warning: IntlDateFormatter::formatObject(): datefmt_format_object: the passed object must be an instance of either IntlCalendar or DateTime in %s on line %d
+Warning: IntlDateFormatter::formatObject(): datefmt_format_object: the passed object must be an instance of either IntlCalendar or DateTimeInterface in %s on line %d
 bool(false)
 
 Warning: IntlDateFormatter::formatObject(): datefmt_format_object: bad IntlCalendar instance: not initialized properly in %s on line %d