diff --git a/libpldm/firmware_update.h b/libpldm/firmware_update.h
index 29bcc86..697a479 100644
--- a/libpldm/firmware_update.h
+++ b/libpldm/firmware_update.h
@@ -22,6 +22,7 @@
 /* Maximum progress percentage value*/
 #define PLDM_FWUP_MAX_PROGRESS_PERCENT 0x65
 #define PLDM_CANCEL_UPDATE_COMPONENT_REQ_BYTES 0
+#define PLDM_CANCEL_UPDATE_REQ_BYTES 0
 
 /** @brief PLDM Firmware update commands
  */
@@ -37,7 +38,8 @@
 	PLDM_APPLY_COMPLETE = 0x18,
 	PLDM_ACTIVATE_FIRMWARE = 0x1A,
 	PLDM_GET_STATUS = 0x1B,
-	PLDM_CANCEL_UPDATE_COMPONENT = 0x1C
+	PLDM_CANCEL_UPDATE_COMPONENT = 0x1C,
+	PLDM_CANCEL_UPDATE = 0x1D
 };
 
 /** @brief PLDM Firmware update completion codes
@@ -1073,6 +1075,20 @@
 					size_t payload_length,
 					uint8_t *completion_code);
 
+/** @brief Create PLDM request message for CancelUpdate
+ *
+ *	@param[in] instance_id - Message's instance id
+ *	@param[in,out] msg - Message will be written to this
+ *  @param[in] payload_length - Length of request message payload
+ *
+ *	@return pldm_completion_codes
+ *
+ *	@note  Caller is responsible for memory alloc and dealloc of param
+ *         'msg.payload'
+ */
+int encode_cancel_update_req(uint8_t instance_id, struct pldm_msg *msg,
+			     size_t payload_length);
+
 #ifdef __cplusplus
 }
 #endif