diff --git a/tools/cooja/config/external_tools_linux.config b/tools/cooja/config/external_tools_linux.config
index 8c4d8826b..53798041d 100644
--- a/tools/cooja/config/external_tools_linux.config
+++ b/tools/cooja/config/external_tools_linux.config
@@ -40,3 +40,5 @@ COMMAND_DATA_START = ^([0-9A-Fa-f]*)[ \t]d[ \t].data$
 COMMAND_DATA_END = ^([0-9A-Fa-f]*)[ \t]A[ \t]_edata$
 COMMAND_BSS_START = ^([0-9A-Fa-f]*)[ \t]A[ \t]__bss_start$
 COMMAND_BSS_END = ^([0-9A-Fa-f]*)[ \t]A[ \t]_end$
+
+VISUALIZER_DEFAULT_SKINS=se.sics.cooja.plugins.skins.IDVisualizerSkin;se.sics.cooja.plugins.skins.GridVisualizerSkin