diff --git a/src/conf.c b/src/conf.c
index c4db9f21..50d04034 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -1531,6 +1531,8 @@ static void string_print(char *str, int id, snd_output_t *out)
 	case '.':
 	case '{':
 	case '}':
+	case '[':
+	case ']':
 	case '\'':
 	case '"':
 		goto quoted;