diff --git a/drivers/sensors/sgp30.c b/drivers/sensors/sgp30.c
index 1c345a3873..ab6cf1fb82 100644
--- a/drivers/sensors/sgp30.c
+++ b/drivers/sensors/sgp30.c
@@ -897,7 +897,7 @@ static int sgp30_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
         {
           /* Input is absolute humidity in unit "mg/m^3". */
 
-          if (arg < 0 || arg >= 256000)
+          if (arg >= 256000)
             {
               ret = -EINVAL;
               break;