diff --git a/targets/TARGET_ONSEMI/TARGET_NCS36510/PinNames.h b/targets/TARGET_ONSEMI/TARGET_NCS36510/PinNames.h
index 41b0f6b4f8c..61305788c75 100644
--- a/targets/TARGET_ONSEMI/TARGET_NCS36510/PinNames.h
+++ b/targets/TARGET_ONSEMI/TARGET_NCS36510/PinNames.h
@@ -37,6 +37,7 @@ extern "C" {
 #endif
 
 typedef enum {
+    NC    = (int)0xFFFFFFFF,
     GPIO0 = 0,
     GPIO1,
     GPIO2,
@@ -59,6 +60,8 @@ typedef enum {
     A1,
     A2,
     A3,
+    A4 = NC,
+    A5 = NC,
     UART1_TX = GPIO0,
     UART1_RX = GPIO1,
     UART2_TX = GPIO8,
@@ -146,8 +149,7 @@ typedef enum {
     D12         = GPIO16,
     D13         = GPIO14,
     D14         = GPIO3,
-    D15         = GPIO2,
-    NC          = (int)0xFFFFFFFF
+    D15         = GPIO2
 } PinName;
 
 typedef enum {
diff --git a/targets/TARGET_ONSEMI/TARGET_NCS36510/analogin_api.c b/targets/TARGET_ONSEMI/TARGET_NCS36510/analogin_api.c
index 5a01b365b6a..29ab895021c 100644
--- a/targets/TARGET_ONSEMI/TARGET_NCS36510/analogin_api.c
+++ b/targets/TARGET_ONSEMI/TARGET_NCS36510/analogin_api.c
@@ -88,7 +88,7 @@ void analogin_init(analogin_t *obj, PinName pin)
         /* Single sample, absolute conversion, scale = 1 */
         obj->adcReg->CONTROL.WORD = ((0 << ADC_CONTROL_MODE_BIT_POS) |
                                      (1 << ADC_CONTROL_MEASTYPE_BIT_POS) |
-                                     (1 << ADC_CONTROL_INPUTSCALE_BIT_POS) |
+                                     (6 << ADC_CONTROL_INPUTSCALE_BIT_POS) |
                                      (((uint8_t)adc_pin) << ADC_CONTROL_MEAS_CH_BIT_POS));
 
         /* Prescaler enabled; set to 7 */