diff --git a/drivers/tpm/tpm_tis_sandbox.c b/drivers/tpm/tpm_tis_sandbox.c
index 80cf734..ed4b039 100644
--- a/drivers/tpm/tpm_tis_sandbox.c
+++ b/drivers/tpm/tpm_tis_sandbox.c
@@ -190,9 +190,7 @@
 		if (seq < 0)
 			return -1;
 		printf("tpm: nvwrite index=%#02x, len=%#02x\n", index, length);
-		memcpy(&tpm->nvdata[seq],
-		       recvbuf + TPM_RESPONSE_HEADER_LENGTH + sizeof(uint32_t),
-		       length);
+		memcpy(&tpm->nvdata[seq], sendbuf + 22, length);
 		*recv_len = 12;
 		memset(recvbuf, '\0', *recv_len);
 		break;