diff --git a/ext/readline/readline.c b/ext/readline/readline.c
index 7ebc9d4be7b..1d4427f0613 100644
--- a/ext/readline/readline.c
+++ b/ext/readline/readline.c
@@ -402,7 +402,7 @@ PHP_FUNCTION(readline_read_history)
 		return;
 	}
 
-	if (!arg || php_check_open_basedir(arg) != 0) {
+	if (arg && php_check_open_basedir(arg)) {
 		RETURN_FALSE;
 	}