diff --git a/libpldm/platform.h b/libpldm/platform.h
index 91128b7..7834f59 100644
--- a/libpldm/platform.h
+++ b/libpldm/platform.h
@@ -49,6 +49,7 @@
 #define PLDM_PDR_REPOSITORY_CHANGE_RECORD_MIN_LENGTH 2
 
 #define PLDM_INVALID_EFFECTER_ID 0xFFFF
+#define PLDM_TID_RESERVED 0xFF
 
 enum pldm_effecter_data_size {
 	PLDM_EFFECTER_DATA_SIZE_UINT8,