diff --git a/boards/arm/stm32g081b_eval/stm32g081b_eval.dts b/boards/arm/stm32g081b_eval/stm32g081b_eval.dts
index 3a22463fcb8..e6765aaf020 100644
--- a/boards/arm/stm32g081b_eval/stm32g081b_eval.dts
+++ b/boards/arm/stm32g081b_eval/stm32g081b_eval.dts
@@ -106,7 +106,7 @@
 };
 
 &adc1 {
-	pinctrl-0 = <&adc1_in3_pa3>;
+	pinctrl-0 = <&adc1_in3_pa3 &adc1_in9_pb1>;
 	pinctrl-names = "default";
 	status = "okay";
 
@@ -121,6 +121,15 @@
 		zephyr,resolution = <12>;
 		zephyr,vref-mv = <3300>;
 	};
+
+	channel@9 {
+		reg = <9>;
+		zephyr,gain = "ADC_GAIN_1";
+		zephyr,reference = "ADC_REF_INTERNAL";
+		zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
+		zephyr,resolution = <12>;
+		zephyr,vref-mv = <3300>;
+	};
 };
 
 &ucpd2 {