diff --git a/src/lagrangian/cfdemParticle/etc/library-liggghts-list.txt b/src/lagrangian/cfdemParticle/etc/library-liggghts-list.txt
new file mode 100644
index 00000000..90e6eb87
--- /dev/null
+++ b/src/lagrangian/cfdemParticle/etc/library-liggghts-list.txt
@@ -0,0 +1,4 @@
+#syntax: makefileName/dir
+#note: dir is not a path, just a keyword here
+###############################################
+M2M/dir