diff --git a/firmware/src/main.rs b/firmware/src/main.rs
index 8b000ad..7ab1c31 100644
--- a/firmware/src/main.rs
+++ b/firmware/src/main.rs
@@ -161,7 +161,9 @@ fn main() {
         // Set up ADC
         let gpio_d = tm4c129x::GPIO_PORTD_AHB.borrow(cs);
         let gpio_e = tm4c129x::GPIO_PORTE_AHB.borrow(cs);
+        gpio_d.afsel.write(|w| w.afsel().bits(FBV_ADC|AV_ADC));
         gpio_d.amsel.write(|w| w.amsel().bits(FBV_ADC|AV_ADC));
+        gpio_e.afsel.write(|w| w.afsel().bits(FD_ADC|FV_ADC|FBI_ADC|IC_ADC));
         gpio_e.amsel.write(|w| w.amsel().bits(FD_ADC|FV_ADC|FBI_ADC|IC_ADC));
 
         sysctl.rcgcadc.modify(|_, w| w.r0().bit(true));