1 files changed, 2 insertions, 2 deletions

diff --git a/crypto/sha1.c b/crypto/sha1.c
index 8048e2dd3c14..21571ed35b7e 100644
--- a/crypto/sha1.c
+++ b/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;
                 }