diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index a1e9ae20..8bf750bf 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2050,8 +2050,9 @@ void test_radio()
 
 void read_ina219()
 {
-  digitalWrite(9, HIGH);
-	
+#ifdef PICO_0V1	
+  digitalWrite(PI_3V3_PIN, HIGH);
+#endif	
   float shuntvoltage = 0;
   float busvoltage = 0;
   float current_mA = 0;