diff --git a/libavcodec/dnxhdenc.h b/libavcodec/dnxhdenc.h
index 80b6f85c898f99b6b3cc22624190bd5ec8cb8c76..279a978cd3a74078c774d3c4587b8f49bbaf20b1 100644
--- a/libavcodec/dnxhdenc.h
+++ b/libavcodec/dnxhdenc.h
@@ -84,8 +84,6 @@ typedef struct DNXHDEncContext {
     unsigned qscale;
     unsigned lambda;
 
-    unsigned thread_size;
-
     uint16_t *mb_bits;
     uint8_t  *mb_qscale;