diff --git a/ChangeLog b/ChangeLog
index e21069593..d70341de5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,8 +1,13 @@
 2003-08-04  Alexandre Duret-Lutz  <aduret@src.lip6.fr>
 
+	* wrap/python/spot.i: Declare spot::ltl_to_tgba as a constructor.
+	* wrap/python/tests/ltl2tgba.py: Do not force `thisown=1' on tgba
+	objects.
+	
 	* wrap/python/spot.i: Include headers from tgba/ and tgbaalgos/.
 	* wrap/python/tests/ltl2tgba.py, wrap/python/tests/ltl2tgba.test:
 	New files.
+
 	* wrap/python/tests/Makefile.am (TESTS): Add ltl2tgba.test.
 	(EXTRA_DIST): Add ltl2tgba.py.
 	* wrap/python/tests/run.in: Distinguish *.py and *.test.
diff --git a/wrap/python/spot.i b/wrap/python/spot.i
index 8379d89f9..d01cdc7d0 100644
--- a/wrap/python/spot.i
+++ b/wrap/python/spot.i
@@ -73,6 +73,8 @@ using namespace spot;
 %include "ltlvisit/tostring.hh"
 %include "ltlvisit/tunabbrev.hh"
 
+%feature("new") spot::ltl_to_tgba;
+
 // Help SWIG with namespace lookups.
 #define ltl spot::ltl
 %include "tgba/bdddict.hh"
diff --git a/wrap/python/tests/ltl2tgba.py b/wrap/python/tests/ltl2tgba.py
index 7590dcd8a..ca84c7184 100755
--- a/wrap/python/tests/ltl2tgba.py
+++ b/wrap/python/tests/ltl2tgba.py
@@ -101,16 +101,11 @@ if f:
     else:
         assert "unknown output option"
 
+    if degeneralize_opt:
+        del degeneralized
     # Must delete absolutely all references to an automaton
     # so that the C++ destructor gets called.
-    del a
-
-    if degeneralize_opt:
-        degeneralized.thisown = 1
-        del degeneralized
-
-    concrete.thisown = 1
-    del concrete
+    del a, concrete
 
 else:
     exit_code = 1