diff --git a/libc/kernel/uapi/linux/psp-sev.h b/libc/kernel/uapi/linux/psp-sev.h
index 8c9ec80..5aefc1c 100644
--- a/libc/kernel/uapi/linux/psp-sev.h
+++ b/libc/kernel/uapi/linux/psp-sev.h
@@ -32,6 +32,7 @@
   SEV_MAX,
 };
 typedef enum {
+  SEV_RET_NO_FW_CALL = - 1,
   SEV_RET_SUCCESS = 0,
   SEV_RET_INVALID_PLATFORM_STATE,
   SEV_RET_INVALID_GUEST_STATE,