diff --git a/drivers/adc/adc_ad4130.c b/drivers/adc/adc_ad4130.c
index 7be4f1a0471..eef671d61f2 100644
--- a/drivers/adc/adc_ad4130.c
+++ b/drivers/adc/adc_ad4130.c
@@ -822,7 +822,7 @@ static int adc_ad4130_wait_for_conv_ready(const struct device *dev)
 
 static int adc_ad4130_perform_read(const struct device *dev)
 {
-	int ret;
+	int ret = 0;
 	struct adc_ad4130_data *data = dev->data;
 	uint16_t ch_idx = AD4130_INVALID_CHANNEL;
 	uint16_t prev_ch_idx = AD4130_INVALID_CHANNEL;
diff --git a/drivers/adc/adc_ad7124.c b/drivers/adc/adc_ad7124.c
index ea1a507f2cd..887c4e54440 100644
--- a/drivers/adc/adc_ad7124.c
+++ b/drivers/adc/adc_ad7124.c
@@ -1119,7 +1119,7 @@ static int adc_ad7124_get_read_chan_id(const struct device *dev, uint16_t *chan_
 
 static int adc_ad7124_perform_read(const struct device *dev)
 {
-	int ret;
+	int ret = 0;
 	struct adc_ad7124_data *data = dev->data;
 	uint16_t ch_idx = -1;
 	uint16_t prev_ch_idx = -1;