diff --git a/variants/standart/variant.c b/variants/standart/variant.c
index 894047f..a6d384c 100644
--- a/variants/standart/variant.c
+++ b/variants/standart/variant.c
@@ -111,6 +111,11 @@ uint32_t* portInputRegister(GPIO_TypeDef* GPIO_x)
 uint32_t analogInputToChannelNumber(uint32_t PinNumber)
 {
   uint32_t adcChannel = 0;
+
+  // if passed a value from 0 - 5, instead of A0 - A5
+  if (PinNumber < 4) PinNumber += 14;
+  else if (PinNumber < 6) PinNumber += 16;
+
   switch (PinNumber)
   {
     case PIN_A0: