diff -ru libunique-1.1.6/unique/uniqueapp.c libunique-1.1.6.patched/unique/uniqueapp.c
--- libunique-1.1.6/unique/uniqueapp.c	2009-11-01 19:33:13.000000000 +0100
+++ libunique-1.1.6.patched/unique/uniqueapp.c	2012-06-08 15:12:16.922173107 +0200
@@ -781,7 +781,7 @@
 }
 
 
-G_CONST_RETURN gchar *
+const gchar *
 unique_command_to_string (UniqueApp *app,
                           gint       command)
 {
@@ -863,7 +863,7 @@
   return retval;
 }
 
-G_CONST_RETURN gchar *
+const gchar *
 unique_response_to_string (UniqueResponse response)
 {
   GEnumClass *enum_class;
Solo in libunique-1.1.6.patched/unique: uniqueapp.lo
Solo in libunique-1.1.6.patched/unique: uniqueapp.o
diff -ru libunique-1.1.6/unique/uniquebackend.c libunique-1.1.6.patched/unique/uniquebackend.c
--- libunique-1.1.6/unique/uniquebackend.c	2009-11-09 12:02:06.000000000 +0100
+++ libunique-1.1.6.patched/unique/uniquebackend.c	2012-06-08 15:12:39.836928820 +0200
@@ -111,7 +111,7 @@
  *
  * Return value: FIXME
  */
-G_CONST_RETURN gchar *
+const gchar *
 unique_backend_get_name (UniqueBackend *backend)
 {
   g_return_val_if_fail (UNIQUE_IS_BACKEND (backend), NULL);
@@ -154,7 +154,7 @@
  *
  * Return value: FIXME
  */
-G_CONST_RETURN gchar *
+const gchar *
 unique_backend_get_startup_id (UniqueBackend *backend)
 {
   g_return_val_if_fail (UNIQUE_IS_BACKEND (backend), NULL);
diff -ru libunique-1.1.6/unique/uniquebackend.h libunique-1.1.6.patched/unique/uniquebackend.h
--- libunique-1.1.6/unique/uniquebackend.h	2009-09-21 14:31:14.000000000 +0200
+++ libunique-1.1.6.patched/unique/uniquebackend.h	2012-06-08 15:10:42.170183223 +0200
@@ -94,10 +94,10 @@
 
 UniqueBackend *       unique_backend_create         (void);
 
-G_CONST_RETURN gchar *unique_backend_get_name       (UniqueBackend     *backend);
+const gchar *         unique_backend_get_name       (UniqueBackend     *backend);
 void                  unique_backend_set_name       (UniqueBackend     *backend,
                                                      const gchar       *name);
-G_CONST_RETURN gchar *unique_backend_get_startup_id (UniqueBackend     *backend);
+const gchar *         unique_backend_get_startup_id (UniqueBackend     *backend);
 void                  unique_backend_set_startup_id (UniqueBackend     *backend,
                                                      const gchar       *startup_id);
 GdkScreen *           unique_backend_get_screen     (UniqueBackend     *backend);
Solo in libunique-1.1.6.patched/unique: uniquebackend.lo
Solo in libunique-1.1.6.patched/unique: uniquebackend.o
Solo in libunique-1.1.6.patched/unique: uniqueenumtypes.lo
Solo in libunique-1.1.6.patched/unique: uniqueenumtypes.o
diff -ru libunique-1.1.6/unique/uniqueinternals.h libunique-1.1.6.patched/unique/uniqueinternals.h
--- libunique-1.1.6/unique/uniqueinternals.h	2009-09-21 14:31:14.000000000 +0200
+++ libunique-1.1.6.patched/unique/uniqueinternals.h	2012-06-08 15:11:34.974620293 +0200
@@ -44,11 +44,11 @@
  * and then back into an id
  */
 UniqueResponse        unique_response_from_string  (const gchar    *response);
-G_CONST_RETURN gchar *unique_response_to_string    (UniqueResponse  response);
+const gchar *         unique_response_to_string    (UniqueResponse  response);
 
 gint                  unique_command_from_string   (UniqueApp      *app,
                                                     const gchar    *command);
-G_CONST_RETURN gchar *unique_command_to_string     (UniqueApp      *app,
+const gchar *         unique_command_to_string     (UniqueApp      *app,
                                                     gint            command);
 
 G_END_DECLS
Solo in libunique-1.1.6.patched/unique: uniquemarshal.lo
Solo in libunique-1.1.6.patched/unique: uniquemarshal.o
diff -ru libunique-1.1.6/unique/uniquemessage.c libunique-1.1.6.patched/unique/uniquemessage.c
--- libunique-1.1.6/unique/uniquemessage.c	2009-11-09 12:02:06.000000000 +0100
+++ libunique-1.1.6.patched/unique/uniquemessage.c	2012-06-08 15:13:39.156296439 +0200
@@ -146,7 +146,7 @@
 void
 unique_message_data_set (UniqueMessageData *message_data,
                          const guchar      *data,
-                         gsize              length)
+                         gssize             length)
 {
   g_return_if_fail (message_data != NULL);
 
@@ -185,7 +185,7 @@
  *
  * Since: 1.0.2
  */
-G_CONST_RETURN guchar *
+const guchar *
 unique_message_data_get (UniqueMessageData *message_data,
                          gsize             *length)
 {
@@ -525,7 +525,7 @@
  *   owned by the #UniqueMessageData structure and should not be
  *   modified or freed
  */
-G_CONST_RETURN gchar *
+const gchar *
 unique_message_data_get_startup_id (UniqueMessageData *message_data)
 {
   g_return_val_if_fail (message_data != NULL, NULL);
diff -ru libunique-1.1.6/unique/uniquemessage.h libunique-1.1.6.patched/unique/uniquemessage.h
--- libunique-1.1.6/unique/uniquemessage.h	2009-09-21 14:31:14.000000000 +0200
+++ libunique-1.1.6.patched/unique/uniquemessage.h	2012-06-08 15:09:32.697148369 +0200
@@ -47,8 +47,8 @@
 
 void                   unique_message_data_set            (UniqueMessageData *message_data,
                                                            const guchar      *data,
-                                                           gsize              length);
-G_CONST_RETURN guchar *unique_message_data_get            (UniqueMessageData *message_data,
+                                                           gssize             length);
+const guchar *         unique_message_data_get            (UniqueMessageData *message_data,
                                                            gsize             *length);
 
 gboolean               unique_message_data_set_text       (UniqueMessageData *message_data,
@@ -63,7 +63,7 @@
 gchar *                unique_message_data_get_filename   (UniqueMessageData *message_data);
 
 GdkScreen *            unique_message_data_get_screen     (UniqueMessageData *message_data);
-G_CONST_RETURN gchar * unique_message_data_get_startup_id (UniqueMessageData *message_data);
+const gchar *          unique_message_data_get_startup_id (UniqueMessageData *message_data);
 guint                  unique_message_data_get_workspace  (UniqueMessageData *message_data);
 
 G_END_DECLS