diff --git a/usr.sbin/bhyve/tpm_intf_crb.c b/usr.sbin/bhyve/tpm_intf_crb.c
--- a/usr.sbin/bhyve/tpm_intf_crb.c
+++ b/usr.sbin/bhyve/tpm_intf_crb.c
@@ -485,6 +485,8 @@
 tpm_crb_deinit(void *sc)
 {
 	struct tpm_crb *crb;
+	struct mem_range mr;
+	char mr_name[NAME_MAX];
 
 	if (sc == NULL) {
 		return;
@@ -495,6 +497,13 @@
 	crb->closing = true;
 	pthread_join(crb->thread, NULL);
 
+	bzero(&mr, sizeof(struct mem_range));
+	strncpy(mr_name, "tpm_intf_crb", sizeof(mr_name));
+	mr.name = mr_name;
+	mr.base = TPM_CRB_ADDRESS;
+	mr.size = TPM_CRB_LOCALITIES_MAX * TPM_CRB_REGS_SIZE;
+	unregister_mem(&mr);
+
 	free(crb);
 }