diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 1ec1b0c0..e4a00f8d 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2821,7 +2821,7 @@ void start_ina219() {
   pinMode(PI_3V3_PIN, INPUT); 	
 //  Serial.print("Pi 3.3V: ");
 //  Serial.println(digitalRead(PI_3V3_PIN));
-/  if (digitalRead(PI_3V3_PIN) == LOW)  {
+  if (digitalRead(PI_3V3_PIN) == LOW)  {
 //  if (true)  {
     Serial.println("Pi Zero not present, powering INA219s through 3.3V pin");  
     pinMode(PI_3V3_PIN, OUTPUT);