diff --git a/schala-lang/language/src/lib.rs b/schala-lang/language/src/lib.rs
index c3aab47..f172c5c 100644
--- a/schala-lang/language/src/lib.rs
+++ b/schala-lang/language/src/lib.rs
@@ -29,5 +29,6 @@ mod builtin;
 mod reduced_ast;
 mod eval;
 mod schala;
+mod visitor;
 
 pub use schala::Schala;
diff --git a/schala-lang/language/src/visitor.rs b/schala-lang/language/src/visitor.rs
new file mode 100644
index 0000000..1637cce
--- /dev/null
+++ b/schala-lang/language/src/visitor.rs
@@ -0,0 +1,4 @@
+
+pub trait Visitor {
+
+}