diff --git a/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC15XX/analogin_api.c b/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC15XX/analogin_api.c
index d5059fd5a0..cb6f70ca37 100644
--- a/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC15XX/analogin_api.c
+++ b/libraries/mbed/targets/hal/TARGET_NXP/TARGET_LPC15XX/analogin_api.c
@@ -59,25 +59,25 @@ void analogin_init(analogin_t *obj, PinName pin) {
         error("ADC pin mapping failed");
     }
     uint32_t port = (pin >> 5);
-	// enable clock for GPIOx
+    // enable clock for GPIOx
     LPC_SYSCON->SYSAHBCLKCTRL0 |= (1UL << (14 + port));
-	// pin enable
-	LPC_SWM->PINENABLE0 &= ~(1UL << obj->adc);
+    // pin enable
+    LPC_SWM->PINENABLE0 &= ~(1UL << obj->adc);
     // configure GPIO as input
     LPC_GPIO_PORT->DIR[port] &= ~(1UL << (pin & 0x1F));
-
+    
     // power up ADC
     if (obj->adc < ADC1_0)
     {
         // ADC0
         LPC_SYSCON->PDRUNCFG &= ~(1 << 10);
         LPC_SYSCON->SYSAHBCLKCTRL0 |= (1 << 27);
-	}
-	else {
-	    // ADC1
+    }
+    else {
+        // ADC1
         LPC_SYSCON->PDRUNCFG &= ~(1 << 11);
         LPC_SYSCON->SYSAHBCLKCTRL0 |= (1 << 28);
-	}
+    }
 
     // select IRC as async. clock, divided by 1
     LPC_SYSCON->ADCASYNCCLKSEL  = 0;
@@ -95,12 +95,18 @@ void analogin_init(analogin_t *obj, PinName pin) {
 }
 
 static inline uint32_t adc_read(analogin_t *obj) {
+    volatile uint32_t channels;
 
     __IO LPC_ADC0_Type *adc_reg = (obj->adc < ADC1_0) ? (__IO LPC_ADC0_Type*)(LPC_ADC0) : (__IO LPC_ADC0_Type*)(LPC_ADC1);
 
+    if (obj->adc >= ADC1_0)
+        channels = ((obj->adc - ADC1_0) & 0x1F);
+    else
+        channels = (obj->adc & 0x1F);
+
     // select channel
     adc_reg->SEQA_CTRL &= ~(0xFFF);
-    adc_reg->SEQA_CTRL |= (1UL << (obj->adc & 0x1F));
+    adc_reg->SEQA_CTRL |= (1UL << channels);
 
     // start conversion and sequence enable
     adc_reg->SEQA_CTRL |= ((1UL << 26) | (1UL << 31));