diff --git a/avr/uart.c b/avr/uart.c
index 2c86659..498baa5 100644
--- a/avr/uart.c
+++ b/avr/uart.c
@@ -1,5 +1,8 @@
 #include <stdio.h>
 
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
 #include <tabby/avr/uart.h>
 
 #define F_CPU 16000000UL