diff --git a/main/php_open_temporary_file.c b/main/php_open_temporary_file.c
index a88c823eedba9..439e5e47e7314 100644
--- a/main/php_open_temporary_file.c
+++ b/main/php_open_temporary_file.c
@@ -287,6 +287,7 @@ PHPAPI int php_open_temporary_fd_ex(const char *dir, const char *pfx, zend_strin
 	fd = php_do_open_temporary_file(dir, pfx, opened_path_p);
 	if (fd == -1) {
 		/* Use default temporary directory. */
+		php_error_docref(NULL, E_NOTICE, "file created in the system's temporary directory");
 		goto def_tmp;
 	}
 	return fd;