diff --git a/embassy-stm32f4/src/exti.rs b/embassy-stm32f4/src/exti.rs
index 90f3ade3..bf1dd3a7 100644
--- a/embassy-stm32f4/src/exti.rs
+++ b/embassy-stm32f4/src/exti.rs
@@ -23,7 +23,7 @@ impl<'a> ExtiManager {
         Self { syscfg }
     }
 
-    pub fn new_pin<T>(&'static mut self, mut pin: T, interrupt: T::Interrupt) -> ExtiPin<T>
+    pub fn new_pin<T>(&'static self, mut pin: T, interrupt: T::Interrupt) -> ExtiPin<T>
     where
         T: HalExtiPin + WithInterrupt,
     {
diff --git a/embassy-stm32l0/src/exti.rs b/embassy-stm32l0/src/exti.rs
index e5650d3d..831fcb2a 100644
--- a/embassy-stm32l0/src/exti.rs
+++ b/embassy-stm32l0/src/exti.rs
@@ -22,7 +22,7 @@ impl<'a> ExtiManager {
         Self { syscfg }
     }
 
-    pub fn new_pin<T>(&'static mut self, pin: T, interrupt: T::Interrupt) -> ExtiPin<T>
+    pub fn new_pin<T>(&'static self, pin: T, interrupt: T::Interrupt) -> ExtiPin<T>
     where
         T: PinWithInterrupt,
     {