diff --git a/ext/intl/dateformat/dateformat.stub.php b/ext/intl/dateformat/dateformat.stub.php
index 7664fa7297d..ed49bcc0d89 100644
--- a/ext/intl/dateformat/dateformat.stub.php
+++ b/ext/intl/dateformat/dateformat.stub.php
@@ -176,7 +176,7 @@ class IntlDateFormatter
     public function format($datetime): string|false {}
 
     /**
-     * @param IntlCalendar|DateTime $datetime
+     * @param IntlCalendar|DateTimeInterface $datetime
      * @param array|int|string|null $format
      * @tentative-return-type
      * @alias datefmt_format_object
diff --git a/ext/intl/dateformat/dateformat_arginfo.h b/ext/intl/dateformat/dateformat_arginfo.h
index 4a9727b7eca..6026077c1ac 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: 23a3a335af66ae42119678d03173ea83869d290c */
+ * Stub hash: cefec46af242e6372a923dea0e1d2cf22da7ef3e */
 
 ZEND_BEGIN_ARG_INFO_EX(arginfo_class_IntlDateFormatter___construct, 0, 0, 1)
 	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 6afc9e6dca5..9e4697902e6 100644
--- a/ext/intl/dateformat/dateformat_format_object.cpp
+++ b/ext/intl/dateformat/dateformat_format_object.cpp
@@ -181,7 +181,7 @@ 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 1bf84027b08..9f5a43c831f 100644
--- a/ext/intl/tests/dateformat_formatObject_error.phpt
+++ b/ext/intl/tests/dateformat_formatObject_error.phpt
@@ -29,7 +29,7 @@ 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