diff --git a/libpldm/firmware_update.c b/libpldm/firmware_update.c
index 6714136..53c1387 100644
--- a/libpldm/firmware_update.c
+++ b/libpldm/firmware_update.c
@@ -1483,3 +1483,27 @@
 	*completion_code = msg->payload[0];
 	return PLDM_SUCCESS;
 }
+
+int encode_cancel_update_req(uint8_t instance_id, struct pldm_msg *msg,
+			     size_t payload_length)
+{
+	if (msg == NULL) {
+		return PLDM_ERROR_INVALID_DATA;
+	}
+
+	if (payload_length != PLDM_CANCEL_UPDATE_REQ_BYTES) {
+		return PLDM_ERROR_INVALID_LENGTH;
+	}
+
+	struct pldm_header_info header = {0};
+	header.instance = instance_id;
+	header.msg_type = PLDM_REQUEST;
+	header.pldm_type = PLDM_FWUP;
+	header.command = PLDM_CANCEL_UPDATE;
+	uint8_t rc = pack_pldm_header(&header, &(msg->hdr));
+	if (rc) {
+		return rc;
+	}
+
+	return PLDM_SUCCESS;
+}
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
diff --git a/libpldm/tests/libpldm_firmware_update_test.cpp b/libpldm/tests/libpldm_firmware_update_test.cpp
index 1e6bdb5..9ef53f7 100644
--- a/libpldm/tests/libpldm_firmware_update_test.cpp
+++ b/libpldm/tests/libpldm_firmware_update_test.cpp
@@ -2788,4 +2788,32 @@
         responseMsg, cancelUpdateComponentResponse.size() - hdrSize,
         &completionCode);
     EXPECT_EQ(rc, PLDM_ERROR_INVALID_LENGTH);
-}
\ No newline at end of file
+}
+
+TEST(CancelUpdate, goodPathEncodeRequest)
+{
+    constexpr uint8_t instanceId = 10;
+    std::array<uint8_t, hdrSize> request{};
+    auto requestMsg = reinterpret_cast<pldm_msg*>(request.data());
+
+    auto rc = encode_cancel_update_req(instanceId, requestMsg,
+                                       PLDM_CANCEL_UPDATE_REQ_BYTES);
+    EXPECT_EQ(rc, PLDM_SUCCESS);
+
+    constexpr std::array<uint8_t, hdrSize> outRequest{0x8A, 0x05, 0x1D};
+    EXPECT_EQ(request, outRequest);
+}
+
+TEST(CancelUpdate, errorPathEncodeRequest)
+{
+    std::array<uint8_t, hdrSize + sizeof(uint8_t)> request{};
+    auto requestMsg = reinterpret_cast<pldm_msg*>(request.data());
+
+    auto rc =
+        encode_cancel_update_req(0, nullptr, PLDM_CANCEL_UPDATE_REQ_BYTES);
+    EXPECT_EQ(rc, PLDM_ERROR_INVALID_DATA);
+
+    rc = encode_cancel_update_req(0, requestMsg,
+                                  PLDM_CANCEL_UPDATE_REQ_BYTES + 1);
+    EXPECT_EQ(rc, PLDM_ERROR_INVALID_LENGTH);
+}