diff --git a/src/power/Power.cpp b/src/power/Power.cpp
index 9a0fb82..3abf170 100644
--- a/src/power/Power.cpp
+++ b/src/power/Power.cpp
@@ -272,7 +272,7 @@ void Power::initPowerState(void) {
       PowerParameters::Battery::CELL_CHARGE_FULL_COLOUMB;
   percentRemaining = initialChargePercentages;
   // Set up flags and pins for them
-  pinMode(PowerParameters::PinConfig::VUSB_SENS, INPUT);
+  pinMode(PowerParameters::PinConfig::VUSB_SENS, INPUT_PULLUP);
   pinMode(PowerParameters::PinConfig::BAT_CHG_STAT, INPUT_PULLUP);
   busPowered = digitalRead(PowerParameters::PinConfig::VUSB_SENS);
   chargingState = digitalRead(PowerParameters::PinConfig::BAT_CHG_STAT);