Fix compilation.

diff --git a/source/base/mpi.cc b/source/base/mpi.cc
index 3077c4d98073587bae99fd70bceccd370fd625f2..6ddcd0d52bd1dab8d7ec522ef0b2a2a89c7d3b3b 100644 (file)
--- a/source/base/mpi.cc
+++ b/source/base/mpi.cc
@@ -401,9 +401,9 @@ namespace Utilities
 
           std::vector<char> all_hostnames(max_hostname_size *
                                           MPI::n_mpi_processes(MPI_COMM_WORLD));
-          const int ierr MPI_Allgather (&hostname_array[0], max_hostname_size, MPI_CHAR,
-                                        &all_hostnames[0], max_hostname_size, MPI_CHAR,
-                                        MPI_COMM_WORLD);
+          const int ierr = MPI_Allgather (&hostname_array[0], max_hostname_size, MPI_CHAR,
+                                          &all_hostnames[0], max_hostname_size, MPI_CHAR,
+                                          MPI_COMM_WORLD);
           AssertThrowMPI(ierr);
 
           // search how often our own hostname appears and the how-manyth