diff --git a/block-sha1/sha1.h b/block-sha1/sha1.h
index c1ae74d3da..81abfd4c1c 100644
--- a/block-sha1/sha1.h
+++ b/block-sha1/sha1.h
@@ -5,9 +5,9 @@
  */
 
 typedef struct {
+	unsigned long long size;
 	unsigned int H[5];
 	unsigned int W[16];
-	unsigned long long size;
 } blk_SHA_CTX;
 
 void blk_SHA1_Init(blk_SHA_CTX *ctx);