diff --git a/chassis_state_manager.cpp b/chassis_state_manager.cpp
index 05cc784..324270b 100644
--- a/chassis_state_manager.cpp
+++ b/chassis_state_manager.cpp
@@ -597,6 +597,19 @@
             BMCNotReady();
     }
 #endif
+
+#ifdef CHECK_FWUPDATE_BEFORE_DO_TRANSITION
+    /*
+     * Do not do transition when the any firmware being updated
+     */
+    if ((value != Transition::Off) &&
+        (phosphor::state::manager::utils::isFirmwareUpdating(this->bus)))
+    {
+        info("Firmware being updated, reject the transition request");
+        throw sdbusplus::xyz::openbmc_project::Common::Error::Unavailable();
+    }
+#endif // CHECK_FWUPDATE_BEFORE_DO_TRANSITION
+
     startUnit(systemdTargetTable.find(value)->second);
     return server::Chassis::requestedPowerTransition(value);
 }