diff --git a/src/core/mpi/MPIWrapper.h b/src/core/mpi/MPIWrapper.h
index e800ec37d86ce410614cc243b25eb96649e358b1..4e2a85bc844ad75283baac40a69bb924c740d788 100755
--- a/src/core/mpi/MPIWrapper.h
+++ b/src/core/mpi/MPIWrapper.h
@@ -55,7 +55,9 @@
 #pragma warning ( push, 1 )
 #endif
 
+namespace walberla {
 #include <mpi.h>
+}
 
 #ifdef _MSC_VER
 #pragma warning ( pop )