diff --git a/Makefile.am b/Makefile.am
index af6f35e..4b5a5fd 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -160,6 +160,7 @@ pkginclude_HEADERS = \
 		config.h \
 		src/backend/history.hh \
 		src/backend/observed_subject.hh \
+		src/backend/plugin.hh \
 		src/backend/policy.hh \
 		src/backend/policy_manager.hh \
 		src/backend/policy_parameters.hh \
diff --git a/src/backend/plugin.hh b/src/backend/plugin.hh
new file mode 100644
index 0000000..17313a6
--- /dev/null
+++ b/src/backend/plugin.hh
@@ -0,0 +1,36 @@
+// src/backend/plugin.hh - Copyright 2005, 2006, University
+//               of Padova, dept. of Pure and Applied
+//               Mathematics
+//
+// This file is part of SGPEMv2.
+//
+// This is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// SGPEMv2 is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with SGPEMv2; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+#ifndef SGPEMV2__PLUGIN_HH
+#define SGPEMV2__PLUGIN_HH 1
+
+#include "config.h"
+
+/** \file plugin.hh 
+ * All loadable modules that want to act as plugins
+ * for SGPEMv2 should implement this interface. */
+
+// FIXME Add Singleton LoadPlugin class.
+/*
+  class LoadPlugin {
+  };
+*/
+
+#endif 
diff --git a/src/backend/pyloader/hook.cc b/src/backend/pyloader/hook.cc
index b2ed528..6426360 100644
--- a/src/backend/pyloader/hook.cc
+++ b/src/backend/pyloader/hook.cc
@@ -36,6 +36,7 @@ extern "C" {
 
 #define SG_CONSTRUCTOR __attribute__ ((constructor))
 #define SG_DESTRUCTOR __attribute__ ((destructor))
+#define _libpyloader_LTX__global_pm (_global_pm);
 
 PolicyManager* _global_pm = NULL;