diff --git a/embassy-stm32/src/adc/mod.rs b/embassy-stm32/src/adc/mod.rs
index 023a94f2..bdb1ab8a 100644
--- a/embassy-stm32/src/adc/mod.rs
+++ b/embassy-stm32/src/adc/mod.rs
@@ -104,6 +104,7 @@ foreach_peripheral!(
         impl crate::adc::Instance for peripherals::ADC3 {}
     };
     (adc, ADC4) => {
+        #[cfg(not(any(stm32g4x1, stm32g4x2, stm32g4x3, stm32g4x4)))]
         impl crate::adc::sealed::Instance for peripherals::ADC4 {
             fn regs() -> crate::pac::adc::Adc {
                 crate::pac::ADC4
@@ -123,6 +124,7 @@ foreach_peripheral!(
             }
         }
 
+        #[cfg(not(any(stm32g4x1, stm32g4x2, stm32g4x3, stm32g4x4)))]
         impl crate::adc::Instance for peripherals::ADC4 {}
     };
     (adc, $inst:ident) => {