diff --git a/src/app/script/app_object.cpp b/src/app/script/app_object.cpp
index ca59c5414..360cff4d8 100644
--- a/src/app/script/app_object.cpp
+++ b/src/app/script/app_object.cpp
@@ -63,7 +63,8 @@ void App_transaction(script::ContextHandle handle)
   if (ctx.isCallable(1)) {
     Tx tx; // Create a new transaction so it exists in the whole
            // duration of the argument function call.
-    ctx.call(1);
+    ctx.copy(1);
+    ctx.call(0);
     tx.commit();
   }
   else
diff --git a/src/script/engine.cpp b/src/script/engine.cpp
index 89284729b..73e6dc957 100644
--- a/src/script/engine.cpp
+++ b/src/script/engine.cpp
@@ -45,11 +45,6 @@ void* Context::getContextUserData()
   return js_getcontext(m_handle);
 }
 
-void Context::call(index_t i)
-{
-  js_call(m_handle, i);
-}
-
 void Context::error(const char* err)
 {
   js_error(m_handle, "%s", err);
@@ -80,6 +75,16 @@ index_t Context::top()
   return js_gettop(m_handle);
 }
 
+void Context::copy(index_t i)
+{
+  js_copy(m_handle, i);
+}
+
+void Context::call(index_t args)
+{
+  js_call(m_handle, args);
+}
+
 bool Context::isUndefined(index_t i)
 {
   return (js_isundefined(m_handle, i) ? true: false);
diff --git a/src/script/engine.h b/src/script/engine.h
index 06f49e882..dc96f6851 100644
--- a/src/script/engine.h
+++ b/src/script/engine.h
@@ -55,7 +55,6 @@ namespace script {
     void setContextUserData(void* userData);
     void* getContextUserData();
 
-    void call(index_t i);
     void error(const char* err);
 
     void pop();
@@ -63,6 +62,8 @@ namespace script {
     void remove(index_t idx);
     void duplicateTop();
     index_t top();
+    void copy(index_t i);
+    void call(index_t args);
 
     bool isUndefined(index_t i);
     bool isNull(index_t i);