diff --git a/embassy-stm32/src/adc/v4.rs b/embassy-stm32/src/adc/v4.rs
index 7e6a219e..eda2b2a7 100644
--- a/embassy-stm32/src/adc/v4.rs
+++ b/embassy-stm32/src/adc/v4.rs
@@ -5,7 +5,7 @@ use embedded_hal_02::blocking::delay::DelayUs;
 use pac::adc::vals::{Adcaldif, Boost, Difsel, Exten, Pcsel};
 use pac::adccommon::vals::Presc;
 
-use super::{AdcPin, Instance};
+use super::{AdcPin, Instance, InternalChannel};
 use crate::time::Hertz;
 use crate::{pac, Peripheral};
 
@@ -53,7 +53,7 @@ impl Resolution {
 // NOTE: Vrefint/Temperature/Vbat are only available on ADC3 on H7, this currently cannot be modeled with stm32-data, so these are available from the software on all ADCs
 pub struct VrefInt;
 impl<T: Instance> InternalChannel<T> for VrefInt {}
-impl<T: Instance> sealed::InternalChannel<T> for VrefInt {
+impl<T: Instance> super::sealed::InternalChannel<T> for VrefInt {
     fn channel(&self) -> u8 {
         19
     }
@@ -61,7 +61,7 @@ impl<T: Instance> sealed::InternalChannel<T> for VrefInt {
 
 pub struct Temperature;
 impl<T: Instance> InternalChannel<T> for Temperature {}
-impl<T: Instance> sealed::InternalChannel<T> for Temperature {
+impl<T: Instance> super::sealed::InternalChannel<T> for Temperature {
     fn channel(&self) -> u8 {
         18
     }
@@ -69,7 +69,7 @@ impl<T: Instance> sealed::InternalChannel<T> for Temperature {
 
 pub struct Vbat;
 impl<T: Instance> InternalChannel<T> for Vbat {}
-impl<T: Instance> sealed::InternalChannel<T> for Vbat {
+impl<T: Instance> super::sealed::InternalChannel<T> for Vbat {
     fn channel(&self) -> u8 {
         // TODO this should be 14 for H7a/b/35
         17
diff --git a/examples/stm32f4/src/bin/adc.rs b/examples/stm32f4/src/bin/adc.rs
index 6f80c1ef..1d030f7d 100644
--- a/examples/stm32f4/src/bin/adc.rs
+++ b/examples/stm32f4/src/bin/adc.rs
@@ -5,7 +5,7 @@
 use cortex_m::prelude::_embedded_hal_blocking_delay_DelayUs;
 use defmt::*;
 use embassy_executor::Spawner;
-use embassy_stm32::adc::{Adc, SampleTime, Temperature, VrefInt};
+use embassy_stm32::adc::{Adc, Temperature, VrefInt};
 use embassy_time::{Delay, Duration, Timer};
 use {defmt_rtt as _, panic_probe as _};