diff --git a/src/OpenFOAM/matrices/LUscalarMatrix/LUscalarMatrixTemplates.C b/src/OpenFOAM/matrices/LUscalarMatrix/LUscalarMatrixTemplates.C
index 5f10a569ee..d7d995cd9c 100644
--- a/src/OpenFOAM/matrices/LUscalarMatrix/LUscalarMatrixTemplates.C
+++ b/src/OpenFOAM/matrices/LUscalarMatrix/LUscalarMatrixTemplates.C
@@ -92,7 +92,7 @@ void Foam::LUscalarMatrix::solve(Field<Type>& sourceSol) const
             {
                 OPstream::write
                 (
-                    Pstream::blocking,
+                    Pstream::scheduled,
                     slave,
                     reinterpret_cast<const char*>
                     (
@@ -106,7 +106,7 @@ void Foam::LUscalarMatrix::solve(Field<Type>& sourceSol) const
         {
             IPstream::read
             (
-                Pstream::blocking,
+                Pstream::scheduled,
                 Pstream::masterNo(),
                 reinterpret_cast<char*>(sourceSol.begin()),
                 sourceSol.byteSize()