diff --git a/cores/arduino/wiring_analog.c b/cores/arduino/wiring_analog.c
index 73c0c55..f33a733 100644
--- a/cores/arduino/wiring_analog.c
+++ b/cores/arduino/wiring_analog.c
@@ -73,6 +73,7 @@ uint32_t analogRead(uint32_t PinNumber)
       // extra least significant bits read from the ADC are discarded
       value = (value >> (MCU_ADC_RESOLUTION - currentResolution));
     }
+    additionalPinsDeinit(PinNumber);
   }
   else
     ErrorMsgHandler("analogRead(): invalid analog pin number");