diff --git a/[refs] b/[refs]
index 4280aa8c21af..443ce3b41c47 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: afad2608c766f53c79ec4ffccdb4bef660b90a89
+refs/heads/master: bcb0ad2b34daade529ce1f38eede0ea8b7309535
diff --git a/trunk/crypto/sha1.c b/trunk/crypto/sha1.c
index 8048e2dd3c14..21571ed35b7e 100644
--- a/trunk/crypto/sha1.c
+++ b/trunk/crypto/sha1.c
@@ -61,8 +61,8 @@ static void sha1_update(void *ctx, const u8 *data, unsigned int len)
 		u32 temp[SHA_WORKSPACE_WORDS];
 
 		if (partial) {
-			done = 64 - partial;
-			memcpy(sctx->buffer + partial, data, done);
+			done = -partial;
+			memcpy(sctx->buffer + partial, data, done + 64);
 			src = sctx->buffer;
 		}