diff --git a/libsrc/core/mpi_wrapper.hpp b/libsrc/core/mpi_wrapper.hpp
index 3cb6ce03..d6d03d58 100644
--- a/libsrc/core/mpi_wrapper.hpp
+++ b/libsrc/core/mpi_wrapper.hpp
@@ -61,7 +61,7 @@ namespace ngcore
     }
     
     NgMPI_Comm (const NgMPI_Comm & c)
-      : comm(c.comm), refcount(c.refcount), rank(c.rank), size(c.siez)
+      : comm(c.comm), refcount(c.refcount), rank(c.rank), size(c.size)
     {
       if (refcount) (*refcount)++;
     }