diff --git a/targets/TARGET_STM/TARGET_STM32L0/analogin_api.c b/targets/TARGET_STM/TARGET_STM32L0/analogin_api.c
index 6219abe0c2..c53447efa3 100644
--- a/targets/TARGET_STM/TARGET_STM32L0/analogin_api.c
+++ b/targets/TARGET_STM/TARGET_STM32L0/analogin_api.c
@@ -41,7 +41,7 @@ int adc_inited = 0;
 void analogin_init(analogin_t *obj, PinName pin)
 {
     uint32_t function = (uint32_t)NC;
-    obj->adc = (ADCName)NC;
+    obj->handle.Instance = (ADC_TypeDef *)NC;
 
     // ADC Internal Channels "pins"  (Temperature, Vref, Vbat, ...)
     //   are described in PinNames.h and PeripheralPins.c