diff --git a/main/jtlc.cc b/main/jtlc.cc
index 523dd65..7478bb4 100644
--- a/main/jtlc.cc
+++ b/main/jtlc.cc
@@ -44,6 +44,6 @@ void compile(const char * filename)
 {
     FILE * out = tmpfile();
     refptr<Node> tree = parse(filename);
-//    tree->process(out);
+    tree->process(out);
     fclose(out);
 }
diff --git a/nodes/Node.h b/nodes/Node.h
index e170172..376cf0e 100644
--- a/nodes/Node.h
+++ b/nodes/Node.h
@@ -1,10 +1,11 @@
 
-#ifndef NODES_H
-#define NODES_H NODES_H
+#ifndef NODE_H
+#define NODE_H NODE_H
 
-#include "util/refptr.h"
+#include <stdint.h>
 #include <vector>
 #include <string>
+#include "util/refptr.h"
 
 class Node
 {
@@ -14,8 +15,9 @@ class Node
         void addChildren(refptr<Node> other);
         std::vector< refptr<Node> > & getChildren() { return m_children; }
 
-        virtual unsigned long getInteger() { return 0ul; }
+        virtual uint64_t getInteger() { return 0x0ULL; }
         virtual std::string getString() { return ""; }
+        virtual void process(FILE * out) { }
 
     protected:
         std::vector< refptr<Node> > m_children;
@@ -25,10 +27,10 @@ class Node
 class IntegerNode : public Node
 {
     public:
-        IntegerNode(unsigned long integer) { m_integer = integer; }
+        IntegerNode(uint64_t integer) { m_integer = integer; }
         unsigned long getInteger() { return m_integer; }
     protected:
-        unsigned long m_integer;
+        uint64_t m_integer;
 };
 
 class StringNode : public Node