diff --git a/tools/cooja/config/external_tools_linux.config b/tools/cooja/config/external_tools_linux.config
index 2d8fc189f..41d2e7fc9 100644
--- a/tools/cooja/config/external_tools_linux.config
+++ b/tools/cooja/config/external_tools_linux.config
@@ -20,4 +20,4 @@ COMPILER_ARGS =
 CONTIKI_STANDARD_PROCESSES = sensors_process;etimer_process;tcpip_process;uip_fw_process;cfs_cooja_process
 CONTIKI_MAIN_TEMPLATE_FILENAME = code_main_template
 MANTIS_MAIN_TEMPLATE_FILENAME = mantis_template.c
-DEFAULT_USERPLATFORMS = ../apps/arm
+DEFAULT_USERPLATFORMS = ../apps/mrm
diff --git a/tools/cooja/config/external_tools_win32.config b/tools/cooja/config/external_tools_win32.config
index b7fb0796f..2656a4be5 100644
--- a/tools/cooja/config/external_tools_win32.config
+++ b/tools/cooja/config/external_tools_win32.config
@@ -20,4 +20,4 @@ COMPILER_ARGS = -mno-cygwin -I'C:/Program Files/Java/jdk1.5.0_06/include' -I'C:/
 CONTIKI_STANDARD_PROCESSES = sensors_process;etimer_process;tcpip_process;uip_fw_process;cfs_cooja_process
 CONTIKI_MAIN_TEMPLATE_FILENAME = code_main_template
 MANTIS_MAIN_TEMPLATE_FILENAME = mantis_template.c
-DEFAULT_USERPLATFORMS = ../apps/arm
+DEFAULT_USERPLATFORMS = ../apps/mrm