diff --git a/libavcodec/dnxhdenc.h b/libavcodec/dnxhdenc.h
index 80b6f85c89..279a978cd3 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;