diff --git a/src/Core/Project.cs b/src/Core/Project.cs
index b679ed1a..d8c1cccf 100644
--- a/src/Core/Project.cs
+++ b/src/Core/Project.cs
@@ -1,6 +1,9 @@
 using System.Collections.Generic;
 using CppSharp.AST;
+
+#if !OLD_PARSER
 using CppSharp.Parser;
+#endif
 
 namespace CppSharp
 {