diff --git a/src/utils.cpp b/src/utils.cpp
index afb291e..fd2e297 100644
--- a/src/utils.cpp
+++ b/src/utils.cpp
@@ -127,6 +127,10 @@
     {
         return "an empty leaf";
     }
+    std::string operator()(const yang::InstanceIdentifier&)
+    {
+        return "an instance identifier";
+    }
     std::string operator()(const yang::Union& type)
     {
         std::ostringstream ss;
@@ -211,6 +215,11 @@
         return ss.str();
     }
 
+    std::string operator()(const instanceIdentifier_& data) const
+    {
+        return data.m_xpath;
+    }
+
     template <typename T>
     std::string operator()(const T& data) const
     {