diff --git a/src/bin/autfilt.cc b/src/bin/autfilt.cc
index e246a3d07..0b16eeffc 100644
--- a/src/bin/autfilt.cc
+++ b/src/bin/autfilt.cc
@@ -533,8 +533,6 @@ namespace
       if (matched == opt_invert)
         return 0;
 
-      ++match_count;
-
       // Postprocessing.
 
       if (opt_mask_acc)
@@ -583,6 +581,8 @@ namespace
 	    return 0;
         }
 
+      ++match_count;
+
       printer.print(aut, nullptr, filename, -1, conversion_time, haut);
 
       if (opt_max_count >= 0 && match_count >= opt_max_count)
diff --git a/src/tests/isomorph.test b/src/tests/isomorph.test
index bb59a5170..e463c872c 100755
--- a/src/tests/isomorph.test
+++ b/src/tests/isomorph.test
@@ -1,6 +1,6 @@
 #!/bin/sh
 # -*- coding: utf-8 -*-
-# Copyright (C) 2014 Laboratoire de Recherche et Développement de
+# Copyright (C) 2014, 2015 Laboratoire de Recherche et Développement de
 # l'Epita (LRDE).
 #
 # This file is part of Spot, a model checking library.
@@ -106,3 +106,6 @@ EOF
 
 run 0 ../../bin/autfilt aut1 --are-isomorphic aut2
 run 0 ../../bin/autfilt aut3 --are-isomorphic aut4
+
+run 0 ../../bin/autfilt -u aut1 aut2 aut2 aut3 -c >out
+test 2 = "`cat out`"