diff --git a/drivers/saul/adc_saul.c b/drivers/saul/adc_saul.c
index 0180b9643f..5acbae45d8 100644
--- a/drivers/saul/adc_saul.c
+++ b/drivers/saul/adc_saul.c
@@ -30,8 +30,6 @@ static int read_adc(const void *dev, phydat_t *res)
 {
     const saul_adc_params_t *params = *((const saul_adc_params_t **)dev);
     res->val[0] = adc_sample(params->line, params->res);
-    res->val[1] = 0;
-    res->val[2] = 0;
     /* Raw ADC reading has no unit */
     res->unit = UNIT_NONE;
     res->scale = 0;
diff --git a/drivers/saul/gpio_saul.c b/drivers/saul/gpio_saul.c
index c1b95600da..1934597822 100644
--- a/drivers/saul/gpio_saul.c
+++ b/drivers/saul/gpio_saul.c
@@ -33,8 +33,6 @@ static int read(const void *dev, phydat_t *res)
 
     res->val[0] = (gpio_read(p->pin)) ? !inverted : inverted;
 
-    res->val[1] = 0;
-    res->val[2] = 0;
     res->unit = UNIT_BOOL;
     res->scale = 0;
     return 1;