diff --git a/arch/avr/src/atmega/atmega_config.h b/arch/avr/src/atmega/atmega_config.h
index 5d784ccf3cc..d9b82ac5e01 100644
--- a/arch/avr/src/atmega/atmega_config.h
+++ b/arch/avr/src/atmega/atmega_config.h
@@ -48,7 +48,7 @@
 /* USARTs ***************************************************************************/
 
 #undef HAVE_USART_DEVICE
-#if defined(CONFIG_AVR_USART0) || defined(CONFIG_AVR_USART0)
+#if defined(CONFIG_AVR_USART0) || defined(CONFIG_AVR_USART1)
 #  define HAVE_USART_DEVICE 1
 #endif
 
diff --git a/arch/avr/src/atmega/atmega_serial.c b/arch/avr/src/atmega/atmega_serial.c
index a6c43995d1d..986bbc4a107 100644
--- a/arch/avr/src/atmega/atmega_serial.c
+++ b/arch/avr/src/atmega/atmega_serial.c
@@ -897,7 +897,7 @@ void up_earlyserialinit(void)
 {
   /* Disable all USARTS */
 
-#ifdef CONFIG_AVR_USART1
+#ifdef CONFIG_AVR_USART0
   usart0_disableusartint(NULL);
 #endif
 #ifdef CONFIG_AVR_USART1
@@ -949,9 +949,6 @@ void up_serialinit(void)
  *
  ****************************************************************************/
 
-#ifdef HAVE_SERIAL_CONSOLE
-#endif
-
 int up_putc(int ch)
 {
 #ifdef HAVE_SERIAL_CONSOLE
@@ -960,7 +957,7 @@ int up_putc(int ch)
 #if defined(CONFIG_USART0_SERIAL_CONSOLE)
   usart0_disableusartint(&imr);
 #else
-  usart1_cdisableusartint(&imr);
+  usart1_disableusartint(&imr);
 #endif
 
   /* Check for LF */