diff --git a/ext/standard/info.c b/ext/standard/info.c
index 32ef94e599f..48e0e85cc51 100644
--- a/ext/standard/info.c
+++ b/ext/standard/info.c
@@ -287,7 +287,7 @@ void php_info_print_style(TSRMLS_D)
 PHPAPI char *php_info_html_esc(char *string TSRMLS_DC)
 {
 	size_t new_len;
-	return php_escape_html_entities(string, strlen(string), &new_len, 0, ENT_QUOTES, NULL TSRMLS_CC);
+	return php_escape_html_entities((unsigned char *) string, strlen(string), &new_len, 0, ENT_QUOTES, NULL TSRMLS_CC);
 }
 /* }}} */