diff --git a/drivers/avr/ir_uart.c b/drivers/avr/ir_uart.c
index 34ef792..c000811 100644
--- a/drivers/avr/ir_uart.c
+++ b/drivers/avr/ir_uart.c
@@ -47,7 +47,8 @@ ir_uart_write_finished_p (void)
 int8_t
 ir_uart_putc (char ch)
 {
-    return usart1_putc (ch);
+    usart1_putc (ch);
+    return 1;
 }