diff --git a/src/main/java/de/dhbwstuttgart/syntaxtree/AbstractASTWalker.java b/src/main/java/de/dhbwstuttgart/syntaxtree/AbstractASTWalker.java
index b7b04084..02331429 100644
--- a/src/main/java/de/dhbwstuttgart/syntaxtree/AbstractASTWalker.java
+++ b/src/main/java/de/dhbwstuttgart/syntaxtree/AbstractASTWalker.java
@@ -187,6 +187,9 @@ public abstract class AbstractASTWalker implements ASTVisitor{
     public void visit(MethodCall methodCall) {
         methodCall.receiver.accept(this);
         methodCall.getArgumentList().accept(this);
+        methodCall.getArgumentList()
+        		  .getArguments()
+        		  .forEach(x -> x.getType().accept(this));
     }
 
     @Override