diff --git a/sonoff/xnrg_02_cse7766.ino b/sonoff/xnrg_02_cse7766.ino
index ba228bd03..17fda1f44 100644
--- a/sonoff/xnrg_02_cse7766.ino
+++ b/sonoff/xnrg_02_cse7766.ino
@@ -205,17 +205,17 @@ bool CseCommand(void)
 
   if (CMND_POWERSET == energy_command_code) {
     if (XdrvMailbox.data_len && power_cycle) {
-      Settings.energy_power_calibration = ((unsigned long)CharToDouble(XdrvMailbox.data) * power_cycle) / CSE_PREF;
+      Settings.energy_power_calibration = (unsigned long)(CharToDouble(XdrvMailbox.data) * power_cycle) / CSE_PREF;
     }
   }
   else if (CMND_VOLTAGESET == energy_command_code) {
     if (XdrvMailbox.data_len && voltage_cycle) {
-      Settings.energy_voltage_calibration = ((unsigned long)CharToDouble(XdrvMailbox.data) * voltage_cycle) / CSE_UREF;
+      Settings.energy_voltage_calibration = (unsigned long)(CharToDouble(XdrvMailbox.data) * voltage_cycle) / CSE_UREF;
     }
   }
   else if (CMND_CURRENTSET == energy_command_code) {
     if (XdrvMailbox.data_len && current_cycle) {
-      Settings.energy_current_calibration = ((unsigned long)CharToDouble(XdrvMailbox.data) * current_cycle) / 1000;
+      Settings.energy_current_calibration = (unsigned long)(CharToDouble(XdrvMailbox.data) * current_cycle) / 1000;
     }
   }
   else serviced = false;  // Unknown command