diff --git a/libsrc/interface/nginterface.cpp b/libsrc/interface/nginterface.cpp
index ad0a72db..fe83b34a 100644
--- a/libsrc/interface/nginterface.cpp
+++ b/libsrc/interface/nginterface.cpp
@@ -124,6 +124,7 @@ void Ng_LoadMesh (const char * filename)
 #ifdef PARALLEL
   MPI_Comm_size(MPI_COMM_WORLD, &ntasks);
   MPI_Comm_rank(MPI_COMM_WORLD, &id);
+  ng_geometry = nullptr;
 #endif
 
   {