diff --git a/source/world_builder/world.cc b/source/world_builder/world.cc
index 2a826696c..1d54d4762 100644
--- a/source/world_builder/world.cc
+++ b/source/world_builder/world.cc
@@ -250,7 +250,7 @@ namespace WorldBuilder
     const int local_seed = prm.get<int>("random number seed");
 
     if (local_seed>=0)
-      random_number_engine.seed(local_seed);
+      random_number_engine.seed(local_seed+MPI_RANK);
 
     /**
      * Now load the features. Some features use for example temperature values,