diff --git a/rp2040-hal-examples/src/bin/uart_loopback.rs b/rp2040-hal-examples/src/bin/uart_loopback.rs
index 73d7f9dcf..fd41b5e1a 100644
--- a/rp2040-hal-examples/src/bin/uart_loopback.rs
+++ b/rp2040-hal-examples/src/bin/uart_loopback.rs
@@ -85,7 +85,7 @@ fn main() -> ! {
         // UART TX (characters sent from RP2350)
         pins.gpio0.into_function(),
         // UART RX (characters received by RP2350)
-        pins.gpio1.into_function(),
+        pins.gpio1.into_pull_up_input().into_function(),
     );
     let mut uart0 = hal::uart::UartPeripheral::new(pac.UART0, uart0_pins, &mut pac.RESETS)
         .enable(
@@ -104,7 +104,7 @@ fn main() -> ! {
         // UART TX (characters sent from RP2350)
         pins.gpio4.into_function(),
         // UART RX (characters received by RP2350)
-        pins.gpio5.into_function(),
+        pins.gpio5.into_pull_up_input().into_function(),
     );
     let mut uart1 = hal::uart::UartPeripheral::new(pac.UART1, uart1_pins, &mut pac.RESETS)
         .enable(
diff --git a/rp235x-hal-examples/src/bin/uart_loopback.rs b/rp235x-hal-examples/src/bin/uart_loopback.rs
index 2e2be1a93..8e4a93050 100644
--- a/rp235x-hal-examples/src/bin/uart_loopback.rs
+++ b/rp235x-hal-examples/src/bin/uart_loopback.rs
@@ -82,7 +82,7 @@ fn main() -> ! {
         // UART TX (characters sent from RP2350)
         pins.gpio0.into_function(),
         // UART RX (characters received by RP2350)
-        pins.gpio1.into_function(),
+        pins.gpio1.into_pull_up_input().into_function(),
     );
     let mut uart0 = hal::uart::UartPeripheral::new(pac.UART0, uart0_pins, &mut pac.RESETS)
         .enable(
@@ -101,7 +101,7 @@ fn main() -> ! {
         // UART TX (characters sent from RP2350)
         pins.gpio4.into_function(),
         // UART RX (characters received by RP2350)
-        pins.gpio5.into_function(),
+        pins.gpio5.into_pull_up_input().into_function(),
     );
     let mut uart1 = hal::uart::UartPeripheral::new(pac.UART1, uart1_pins, &mut pac.RESETS)
         .enable(