Implemented PEP 370
diff --git a/Include/pydebug.h b/Include/pydebug.h
index 1174f0c..0e7937d 100644
--- a/Include/pydebug.h
+++ b/Include/pydebug.h
@@ -19,6 +19,7 @@
 PyAPI_DATA(int) Py_IgnoreEnvironmentFlag;
 PyAPI_DATA(int) Py_DivisionWarningFlag;
 PyAPI_DATA(int) Py_DontWriteBytecodeFlag;
+PyAPI_DATA(int) Py_NoUserSiteDirectory;
 /* _XXX Py_QnewFlag should go away in 3.0.  It's true iff -Qnew is passed,
   on the command line, and is used in 2.2 by ceval.c to make all "/" divisions
   true divisions (which they will be in 3.0). */