diff --git a/include/core/yaml/parser_yaml.hpp b/include/core/yaml/parser_yaml.hpp
index 99c1c8c10180318e3a84f0e307ef80be97d85c76..b4dd578252bbf357809a69dae625538add0b0e37 100644
--- a/include/core/yaml/parser_yaml.hpp
+++ b/include/core/yaml/parser_yaml.hpp
@@ -355,6 +355,8 @@ void ParserYAML::walkTreeR(YAML::Node n, std::vector<std::string>& tags, std::st
       }
         break;
     }
+      case YAML::NodeType::Null :
+        break;
     default:
         assert(1 == 0 && "Unsupported node Type at walkTreeR.");
         break;