diff --git a/video/out/vo.h b/video/out/vo.h
index a98b0f9496..8e397618eb 100644
--- a/video/out/vo.h
+++ b/video/out/vo.h
@@ -167,7 +167,7 @@ struct mp_pass_perf {
 };
 
 #define VO_PASS_PERF_MAX 64
-#define VO_PASS_DESC_MAX_LEN 128
+#define VO_PASS_DESC_MAX_LEN 256
 
 struct mp_frame_perf {
     int count;