diff --git a/src/schema.hpp b/src/schema.hpp
index 8cdffa1..b8baf34 100644
--- a/src/schema.hpp
+++ b/src/schema.hpp
@@ -54,6 +54,7 @@
     virtual bool isModule(const std::string& name) const = 0;
     virtual bool listHasKey(const schemaPath_& location, const ModuleNodePair& node, const std::string& key) const = 0;
     virtual bool leafIsKey(const std::string& leafPath) const = 0;
+    virtual bool isConfig(const std::string& path) const = 0;
     virtual const std::set<std::string> listKeys(const schemaPath_& location, const ModuleNodePair& node) const = 0;
     virtual yang::TypeInfo leafType(const schemaPath_& location, const ModuleNodePair& node) const = 0;
     virtual yang::TypeInfo leafType(const std::string& path) const = 0;