diff --git a/src/parser.hpp b/src/parser.hpp
index 29ce3f1..3c009e6 100644
--- a/src/parser.hpp
+++ b/src/parser.hpp
@@ -30,7 +30,7 @@
     command_ parseCommand(const std::string& line, std::ostream& errorStream);
     void changeNode(const dataPath_& name);
     std::string currentNode() const;
-    std::set<std::string> availableNodes(const boost::optional<boost::variant<dataPath_, schemaPath_>>& path, const Recursion& option) const;
+    std::set<std::string> availableNodes(const boost::optional<boost::variant<boost::variant<dataPath_, schemaPath_>, module_>>& path, const Recursion& option) const;
     std::set<std::string> completeCommand(const std::string& line, std::ostream& errorStream) const;
 
 private: