diff --git a/libavfilter/vf_hflip.c b/libavfilter/vf_hflip.c
index faf32853ef..519a609fd0 100644
--- a/libavfilter/vf_hflip.c
+++ b/libavfilter/vf_hflip.c
@@ -46,7 +46,7 @@ static int query_formats(AVFilterContext *ctx)
     AVFilterFormats *pix_fmts = NULL;
     int fmt;
 
-    for (fmt = 0; fmt < AV_PIX_FMT_NB; fmt++) {
+    for (fmt = 0; av_pix_fmt_desc_get(fmt); fmt++) {
         const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(fmt);
         if (!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL ||
               desc->flags & AV_PIX_FMT_FLAG_BITSTREAM ||