diff --git a/lib/tpm-v2.c b/lib/tpm-v2.c
index 59e6cba..ad2b5ab 100644
--- a/lib/tpm-v2.c
+++ b/lib/tpm-v2.c
@@ -821,7 +821,7 @@
 	if (*recv_size < 12)
 		return -ENODATA;
 	*recv_size -= 12;
-	memcpy(recvbuf, recvbuf + 12, *recv_size);
+	memmove(recvbuf, recvbuf + 12, *recv_size);
 
 	return 0;
 }