diff --git a/drivers/tpm/tpm_tis_lpc.c b/drivers/tpm/tpm_tis_lpc.c
index eecf18c..d09f8ce 100644
--- a/drivers/tpm/tpm_tis_lpc.c
+++ b/drivers/tpm/tpm_tis_lpc.c
@@ -274,7 +274,7 @@
 		 * changes to zero exactly after the last byte is fed into the
 		 * FIFO.
 		 */
-		count = min(burst, len - offset - 1);
+		count = min((u32)burst, len - offset - 1);
 		while (count--)
 			tpm_write_byte(data[offset++],
 				  &lpc_tpm_dev[locality].data);