--- trunk/mdtools/headers/AbstractClasses.hpp	2002/07/09 18:40:59	11
+++ trunk/mdtools/headers/AbstractClasses.hpp	2002/10/09 22:29:40	131
@@ -2,7 +2,10 @@
 #define _ABSTRACT_CLASSES_H_
 
 #include "Atom.hpp"
+#ifdef IS_MPI
 
+#include "mpi.h"
+#endif
 class Constraint{
 
 public: