diff --git a/src/gpio.rs b/src/gpio.rs
index a1103b499..a65018767 100644
--- a/src/gpio.rs
+++ b/src/gpio.rs
@@ -300,7 +300,7 @@ impl<MODE, const P: char, const N: u8> Pin<Output<MODE>, P, N> {
 
 impl<const P: char, const N: u8> Pin<Output<OpenDrain>, P, N> {
     /// Enables / disables the internal pull up
-    pub fn internal_pull_up(&mut self, on: bool) {
+    pub fn internal_pull_up(self, on: bool) -> Self {
         let offset = 2 * { N };
         let value = if on { 0b01 } else { 0b00 };
         unsafe {
@@ -308,6 +308,8 @@ impl<const P: char, const N: u8> Pin<Output<OpenDrain>, P, N> {
                 .pupdr
                 .modify(|r, w| w.bits((r.bits() & !(0b11 << offset)) | (value << offset)))
         };
+
+        self
     }
 
     /// Enables / disables the internal pull down