diff --git a/firmware/lib/mocked_secdata_tpm.c b/firmware/lib/mocked_secdata_tpm.c
index 9aa0927..dc9f16c 100644
--- a/firmware/lib/mocked_secdata_tpm.c
+++ b/firmware/lib/mocked_secdata_tpm.c
@@ -33,6 +33,6 @@
 
 uint32_t RollbackFwmpRead(struct RollbackSpaceFwmp *fwmp)
 {
-	ctx->flags |= VB2_CONTEXT_NO_SECDATA_FWMP;
+	memset(fwmp, 0, sizeof(*fwmp));
 	return TPM_SUCCESS;
 }