diff --git a/include/aare/ClusterFile.hpp b/include/aare/ClusterFile.hpp
index 7456d0f..f42b24f 100644
--- a/include/aare/ClusterFile.hpp
+++ b/include/aare/ClusterFile.hpp
@@ -1,7 +1,7 @@
 
 
 #include "aare/defs.hpp"
-
+#include <filesystem>
 #include <fstream>
 
 namespace aare {
@@ -56,4 +56,4 @@ class ClusterFile {
 
 };
 
-} // namespace aare
\ No newline at end of file
+} // namespace aare