diff --git a/arch/arm/src/sama5/sam_adc.c b/arch/arm/src/sama5/sam_adc.c
index 24d49e1395c..1c739d1030d 100644
--- a/arch/arm/src/sama5/sam_adc.c
+++ b/arch/arm/src/sama5/sam_adc.c
@@ -2023,7 +2023,7 @@ struct adc_dev_s *sam_adc_initialize(void)
       regval |= PMC_PCR_PID(SAM_PID_ADC) | PMC_PCR_CMD | PMC_PCR_EN;
       sam_adc_putreg(priv, SAM_PMC_PCR, regval);
 
-      /* Enable the ADC peripheral clock*/
+      /* Enable the ADC peripheral clock */
 
       sam_adc_enableclk();