diff --git a/src/cpu/VirtualFluidsCore/Utilities/CheckpointConverter.h b/src/cpu/VirtualFluidsCore/Utilities/CheckpointConverter.h
index 6d5b3c686dbbc2d688df1b59dedba9c696c2959d..6fe24772d574a6db67428a820027971b4c7fd230 100644
--- a/src/cpu/VirtualFluidsCore/Utilities/CheckpointConverter.h
+++ b/src/cpu/VirtualFluidsCore/Utilities/CheckpointConverter.h
@@ -32,7 +32,7 @@ protected:
 private:
     MPI_Datatype gridParamType, block3dType;
     MPI_Datatype dataSetParamType, dataSetTypeRead, dataSetTypeWrite;
-    MPI_Datatype boundCondType, boundCondType1000, dataSetDoubleType;
+    MPI_Datatype boundCondType, boundCondType1000;
 
     MPIIODataStructures::boundCondParam boundCondParamStr;
 };