diff --git a/src/clustering.cpp b/src/clustering.cpp
index be04608ed7fae86ffc047a1191e0a183f3ec2fcb..b5a4a7c75333db9538f6731cc9ea5b6f8e1c5678 100644
--- a/src/clustering.cpp
+++ b/src/clustering.cpp
@@ -1,3 +1,5 @@
+/******* DEPRECATED *******/
+
 #include "clustering.h"
 
 #include <fstream>      // std::ofstream
diff --git a/src/clustering.h b/src/clustering.h
index 5d4c3891cfc2e9f15cb5db790d0329ad8ef805ea..a41b9fdb526a1f65fa75e819e5b829de467a6171 100644
--- a/src/clustering.h
+++ b/src/clustering.h
@@ -1,3 +1,5 @@
+/******* DEPRECATED *******/
+
 #ifndef CLUSTERING_H
 #define CLUSTERING_H