diff -Naur a/decompiler/codegen.h b/decompiler/codegen.h
--- a/decompiler/codegen.h	2011-02-13 11:12:31.000000000 +0100
+++ b/decompiler/codegen.h	2012-11-03 21:16:34.925246550 +0100
@@ -27,6 +27,8 @@
 #include <utility>
 
 #include <boost/intrusive_ptr.hpp>
+using boost::intrusive_ptr_add_ref;
+using boost::intrusive_ptr_release;
 
 #ifndef DEC_CODEGEN_H
 #define DEC_CODEGEN_H
diff -Naur a/decompiler/instruction.h b/decompiler/instruction.h
--- a/decompiler/instruction.h	2011-02-13 11:12:31.000000000 +0100
+++ b/decompiler/instruction.h	2012-11-03 21:31:14.139247101 +0100
@@ -33,6 +33,9 @@
 #include "value.h"
 #include "wrongtype.h"
 
+using boost::intrusive_ptr_add_ref;
+using boost::intrusive_ptr_release;
+
 class CodeGenerator;
 class Engine;
 
diff -Naur a/decompiler/value.h b/decompiler/value.h
--- a/decompiler/value.h	2011-02-13 11:12:31.000000000 +0100
+++ b/decompiler/value.h	2012-11-03 21:22:28.449247153 +0100
@@ -34,6 +34,9 @@
 #include "stack.h"
 #include "wrongtype.h"
 
+using boost::intrusive_ptr_add_ref;
+using boost::intrusive_ptr_release;
+
 class Value;
 
 const int kNoPrecedence = 0;          ///< Precedence value for individual values with no operations.