diff --git a/source/adios2/toolkit/format/dataman/DataManSerializer.cpp b/source/adios2/toolkit/format/dataman/DataManSerializer.cpp
index e343fb76fc..e6e20fdb16 100644
--- a/source/adios2/toolkit/format/dataman/DataManSerializer.cpp
+++ b/source/adios2/toolkit/format/dataman/DataManSerializer.cpp
@@ -622,7 +622,6 @@ void DataManSerializer::Log(const int level, const std::string &message,
     }
 }
 
-template <>
 void DataManSerializer::PutData(
     const std::string *inputData, const std::string &varName,
     const Dims &varShape, const Dims &varStart, const Dims &varCount,
diff --git a/source/adios2/toolkit/format/dataman/DataManSerializer.h b/source/adios2/toolkit/format/dataman/DataManSerializer.h
index 65e4b430aa..44647ccbd2 100644
--- a/source/adios2/toolkit/format/dataman/DataManSerializer.h
+++ b/source/adios2/toolkit/format/dataman/DataManSerializer.h
@@ -93,6 +93,14 @@ class DataManSerializer
     void PutAttributes(core::IO &io);
 
     // put a variable for writer
+    void PutData(const std::string *inputData, const std::string &varName,
+                 const Dims &varShape, const Dims &varStart,
+                 const Dims &varCount, const Dims &varMemStart,
+                 const Dims &varMemCount, const std::string &doid,
+                 const size_t step, const int rank, const std::string &address,
+                 const std::vector<std::shared_ptr<core::Operator>> &ops,
+                 VecPtr localBuffer = nullptr, JsonPtr metadataJson = nullptr);
+
     template <class T>
     void PutData(const T *inputData, const std::string &varName,
                  const Dims &varShape, const Dims &varStart,