diff --git a/software/Makefile b/software/Makefile
index 35b41497ea1ca157a522c52c9195646eb3e3dd7a..0b1f7909955a3ca4616f428520617393625b2ab8 100644
--- a/software/Makefile
+++ b/software/Makefile
@@ -7,8 +7,12 @@ ifeq ($(BOARD), ibr-node)
 RIOTBASE ?= ../../ibrRiot-Copy/
 CFLAGS += -DGNRC_PKTBUF_SIZE=1024
 
-else
+else ifeq ($(BOARD), avr-rss2)
 
+RIOTBASE ?= ../../ibrRiot-Copy/
+CFLAGS += -DGNRC_PKTBUF_SIZE=512
+
+else
 RIOTBASE ?= ../../RIOT/
 CFLAGS += -DGNRC_PKTBUF_SIZE=512