diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 94eca9bd11..80ba858b23 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -973,7 +973,7 @@ int ff_get_format(AVCodecContext *avctx, const enum AVPixelFormat *fmt)
 
         do
             choices[n] = choices[n + 1];
-        while (choices[n] != AV_PIX_FMT_NONE);
+        while (choices[n++] != AV_PIX_FMT_NONE);
     }
 
     av_freep(&choices);