diff --git a/src/interpreter.hpp b/src/interpreter.hpp
index 67940c8..e008375 100644
--- a/src/interpreter.hpp
+++ b/src/interpreter.hpp
@@ -12,6 +12,7 @@
 #include "datastore_access.hpp"
 #include "parser.hpp"
 
+
 struct Interpreter : boost::static_visitor<void> {
     Interpreter(Parser& parser, DatastoreAccess& datastore);
 
@@ -32,10 +33,10 @@
     std::string buildTypeInfo(const std::string& path) const;
 
     template <typename PathType>
-    std::string toCanonicalPath(const boost::optional<PathType>& path) const;
+    boost::variant<dataPath_, schemaPath_, module_> toCanonicalPath(const boost::optional<PathType>& path) const;
 
     template <typename PathType>
-    std::string toCanonicalPath(const PathType& path) const;
+    boost::variant<dataPath_, schemaPath_, module_> toCanonicalPath(const PathType& path) const;
 
     Parser& m_parser;
     DatastoreAccess& m_datastore;