diff --git a/ext/standard/streamsfuncs.c b/ext/standard/streamsfuncs.c
index 08a090c2a6c..3f03bfc7c5d 100644
--- a/ext/standard/streamsfuncs.c
+++ b/ext/standard/streamsfuncs.c
@@ -1629,7 +1629,7 @@ PHP_FUNCTION(stream_isatty)
 {
 	zval *zsrc;
 	php_stream *stream;
-	zend_long fileno;
+	php_socket_t fileno;
 
 	ZEND_PARSE_PARAMETERS_START(1, 1)
 		Z_PARAM_RESOURCE(zsrc)