diff --git a/scripting/python_scripter.cc b/scripting/python_scripter.cc
--- a/scripting/python_scripter.cc
+++ b/scripting/python_scripter.cc
@@ -527,6 +527,7 @@
     handle<> argstuph( PyTuple_New( args.size() ) );
     for ( int i = 0; i < (int) objectvect.size(); ++i )
     {
+      Py_XINCREF((objectvect.begin() +i)->ptr());
       PyTuple_SetItem( argstuph.get(), i, (objectvect.begin() +i)->ptr() );
     };
     tuple argstup( argstuph );