diff --git a/libpldm/pldm_types.h b/libpldm/pldm_types.h
index 7ff1527..5ec53ff 100644
--- a/libpldm/pldm_types.h
+++ b/libpldm/pldm_types.h
@@ -10,6 +10,7 @@
 		uint8_t bit1 : 1;
 		uint8_t bit2 : 1;
 		uint8_t bit3 : 1;
+		uint8_t bit4 : 1;
 		uint8_t bit5 : 1;
 		uint8_t bit6 : 1;
 		uint8_t bit7 : 1;