diff --git a/src/utils.hpp b/src/utils.hpp
index f0f7ae5..2f93bfb 100644
--- a/src/utils.hpp
+++ b/src/utils.hpp
@@ -17,7 +17,7 @@
 std::string stripLastNodeFromPath(const std::string& path);
 schemaPath_ pathWithoutLastNode(const schemaPath_& path);
 dataPath_ pathWithoutLastNode(const dataPath_& path);
-std::string leafDataTypeToString(yang::LeafDataTypes type);
+std::string leafDataTypeToString(const yang::LeafDataType& type);
 std::string fullNodeName(const schemaPath_& location, const ModuleNodePair& pair);
 std::string fullNodeName(const dataPath_& location, const ModuleNodePair& pair);
 std::string leafDataToString(const leaf_data_ value);