diff --git a/source/adios2/engine/dataman/DataManWriter.h b/source/adios2/engine/dataman/DataManWriter.h
index d1a840ab60a03bdf857c5b7033875f2329fedf78..28f90894127b1b92d6953985c2a7bc58eedc2c9a 100644
--- a/source/adios2/engine/dataman/DataManWriter.h
+++ b/source/adios2/engine/dataman/DataManWriter.h
@@ -12,7 +12,6 @@
 #define ADIOS2_ENGINE_DATAMAN_DATAMAN_WRITER_H_
 
 #include <iostream> //std::cout must be removed, only used for hello example
-#include <unistd.h> //sleep must be removed
 
 #include "adios2/ADIOSConfig.h"
 #include "adios2/core/Engine.h"
diff --git a/source/adios2/engine/dataman/DataManWriter.tcc b/source/adios2/engine/dataman/DataManWriter.tcc
index 38b154ba8155e3b149d43f6705558d03fbc48415..e12f03da5ad774cce459bbbcfa714bc3c8d009ff 100644
--- a/source/adios2/engine/dataman/DataManWriter.tcc
+++ b/source/adios2/engine/dataman/DataManWriter.tcc
@@ -73,10 +73,6 @@ void DataManWriter::DoWriteCommon(Variable<T> &variable, const T *values)
                 std::cout << "Rank: " << i << "\n";
                 std::cout << std::endl;
             }
-            else
-            {
-                sleep(1);
-            }
         }
         MPI_Barrier(m_MPIComm);
     }