diff --git a/drivers/char/tpm/eventlog/tpm2.c b/drivers/char/tpm/eventlog/tpm2.c
index 1b8fa9de2cacedbbc2a290f4f75ccc75fd4c270d..41b9f6c92da73114379f2dda56b34a7c1ac89058 100644
--- a/drivers/char/tpm/eventlog/tpm2.c
+++ b/drivers/char/tpm/eventlog/tpm2.c
@@ -37,8 +37,8 @@
  *
  * Returns size of the event. If it is an invalid event, returns 0.
  */
-static int calc_tpm2_event_size(struct tcg_pcr_event2 *event,
-				struct tcg_pcr_event *event_header)
+static size_t calc_tpm2_event_size(struct tcg_pcr_event2 *event,
+				   struct tcg_pcr_event *event_header)
 {
 	struct tcg_efi_specid_event *efispecid;
 	struct tcg_event_field *event_field;