2 files changed, 2 insertions, 2 deletions
diff --git a/source/core/StarJsonPatch.cpp b/source/core/StarJsonPatch.cpp
index 34c6a82..49b6749 100644
--- a/source/core/StarJsonPatch.cpp
+++ b/source/core/StarJsonPatch.cpp
@@ -27,7 +27,7 @@ namespace JsonPatching {
       {"copy", std::bind(applyCopyOperation, _1, _2)},
   };
 
-  Json applyOperation(Json const& base, Json const& op) {
+  Json applyOperation(Json const& base, Json const& op, Maybe<Json> const& external) {
     try {
       auto operation = op.getString("op");
       return JsonPatching::functionMap.get(operation)(base, op);
diff --git a/source/core/StarJsonPatch.hpp b/source/core/StarJsonPatch.hpp
index bd331c4..5610cc6 100644
--- a/source/core/StarJsonPatch.hpp
+++ b/source/core/StarJsonPatch.hpp
@@ -13,7 +13,7 @@ Json jsonPatch(Json const& base, JsonArray const& patch);
 
 namespace JsonPatching {
   // Applies the given single operation
-  Json applyOperation(Json const& base, Json const& op);
+  Json applyOperation(Json const& base, Json const& op, Maybe<Json> const& external = {});
 
   // Tests for "value" at "path"
   // Returns base or throws JsonPatchException