diff --git a/yarrow.h b/yarrow.h
index 5dbb3be8e68d5b01e23156903f922710a5c763f1..464f9947740d400175f5b4e79707c4d887683d18 100644
--- a/yarrow.h
+++ b/yarrow.h
@@ -82,12 +82,6 @@ struct yarrow256_ctx
   struct aes_ctx key;
   uint8_t counter[AES_BLOCK_SIZE];
 
-  uint8_t buffer[AES_BLOCK_SIZE];
-  unsigned index;
-
-  /* Number of block generated with the current key */
-  unsigned block_count;
-
   /* The entropy sources */
   unsigned nsources;
   struct yarrow_source *sources;