diff --git a/src/billy_objects.cpp b/src/billy_objects.cpp
index 0cf0bdb..e737294 100644
--- a/src/billy_objects.cpp
+++ b/src/billy_objects.cpp
@@ -119,6 +119,8 @@ namespace character {
                 case toolsHash:
                     billy.emplace(static_cast<tools>(value), std::make_unique<Tools>(static_cast<tools>(value)));
                     break;
+                default:
+                    throw std::logic_error("Wrong hash for from_json in BillyObjects::from_json");
             }
         }
     }