diff --git a/cpu/avr/rtimer-arch.c b/cpu/avr/rtimer-arch.c
index 6958e39f6..2a38e6619 100644
--- a/cpu/avr/rtimer-arch.c
+++ b/cpu/avr/rtimer-arch.c
@@ -51,7 +51,7 @@
 #include "sys/rtimer.h"
 #include "rtimer-arch.h"
 
-#if defined(__AVR_ATmega1281__) || defined(__AVR_ATmega1284P__)
+#if defined(__AVR_ATmega1284P__)
 #define ETIMSK TIMSK3
 #define ETIFR TIFR3
 #define TICIE3 ICIE3
@@ -65,7 +65,7 @@
 #define OCF3C	OCF3B
 #endif
 
-#if defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega128RFA1__) 
+#if defined(__AVR_ATmega1281__) || defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega128RFA1__)
 #define ETIMSK TIMSK3
 #define ETIFR TIFR3
 #define TICIE3 ICIE3