diff --git a/src/Pstream/mpi/UPstream.C b/src/Pstream/mpi/UPstream.C
index 3123aa4787..9438b1ca9a 100644
--- a/src/Pstream/mpi/UPstream.C
+++ b/src/Pstream/mpi/UPstream.C
@@ -581,7 +581,6 @@ void Foam::UPstream::waitRequest(const label i)
             << Foam::abort(FatalError);
     }
 
-    int flag;
     if
     (
         MPI_Wait