diff --git a/src/power_control.cpp b/src/power_control.cpp
index 563b008..7362c6c 100644
--- a/src/power_control.cpp
+++ b/src/power_control.cpp
@@ -1786,6 +1786,7 @@
             break;
         }
         case Event::sioS5DeAssert:
+            psPowerOKWatchdogTimerStart();
             setPowerState(PowerState::waitForPSPowerOK);
             break;
         case Event::sioPowerGoodAssert:
@@ -1876,6 +1877,7 @@
         }
         case Event::sioS5DeAssert:
             powerCycleTimer.cancel();
+            psPowerOKWatchdogTimerStart();
             setPowerState(PowerState::waitForPSPowerOK);
             break;
         case Event::powerButtonPressed: