diff --git a/source/adios2/core/Engine.tcc b/source/adios2/core/Engine.tcc
index c8df4013aa..19c80601a5 100644
--- a/source/adios2/core/Engine.tcc
+++ b/source/adios2/core/Engine.tcc
@@ -27,8 +27,9 @@ template <class T>
 typename Variable<T>::Span &Engine::Put(Variable<T> &variable,
                                         const bool initialize, const T &value)
 {
-    CheckOpenModes({{Mode::Write}}, " for variable " + variable.m_Name +
-                                        ", in call to Variable<T>::Span Put");
+    CheckOpenModes({{Mode::Write, Mode::Append}},
+                   " for variable " + variable.m_Name +
+                       ", in call to Variable<T>::Span Put");
     if (!variable.m_Operations.empty())
     {
         helper::Throw<std::invalid_argument>(