diff --git a/tools/cooja/config/external_tools_linux.config b/tools/cooja/config/external_tools_linux.config
index d1c563f81..45a8c7ead 100644
--- a/tools/cooja/config/external_tools_linux.config
+++ b/tools/cooja/config/external_tools_linux.config
@@ -4,6 +4,8 @@ PATH_MAKE = make
 PATH_LINKER = ld
 PATH_SHELL = sh
 PATH_C_COMPILER = gcc
+PATH_NM=nm
+NM_ARGS=
 CMD_GREP_PROCESSES = grep "^PROCESS_THREAD([^,]*,[^,]*,[^)]*)" -o -H
 REGEXP_PARSE_PROCESSES = ([^/]*.c):PROCESS_THREAD\\(([^,]*),[^,]*,[^)]*\\)
 CMD_GREP_INTERFACES = grep "^SIM_INTERFACE([^,]*," -o -d skip -D skip -H -r
diff --git a/tools/cooja/config/external_tools_win32.config b/tools/cooja/config/external_tools_win32.config
index b610b7ee1..5723aa39d 100644
--- a/tools/cooja/config/external_tools_win32.config
+++ b/tools/cooja/config/external_tools_win32.config
@@ -4,6 +4,8 @@ PATH_MAKE = make
 PATH_LINKER = ld
 PATH_SHELL = sh
 PATH_C_COMPILER = gcc
+PATH_NM=nm
+NM_ARGS=-C
 CMD_GREP_PROCESSES = grep '^PROCESS_THREAD([^,]*,[^,]*,[^)]*)' -o -d skip -D skip -H -r
 REGEXP_PARSE_PROCESSES = ([^/]*.c):PROCESS_THREAD\\(([^,]*),[^,]*,[^)]*\\)
 CMD_GREP_INTERFACES = grep '^SIM_INTERFACE([^,]*,' -o -d skip -D skip -H -r