diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
index 9eab3d0a9ffedef0f9a8e78e92dcba416fb8d4e6..1859fe3d4152e86a2223e48145726bcff8efe5bb 100644
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@@ -39,7 +39,7 @@ enum CodecType {
 };
 
 enum PixelFormat {
-    //PIX_FMT_ANY,
+    PIX_FMT_ANY = -1,
     PIX_FMT_YUV420P,
     PIX_FMT_YUV422,
     PIX_FMT_RGB24,