diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 0f575512c7..6fdfb154ff 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2009-02-04  Tristan Gingold  <gingold@adacore.com>
+
+	* solist.h (struct target_so_ops): Comment fallback behavior for
+	operation same.
+
 2009-02-03  Tom Tromey  <tromey@redhat.com>
 
 	* completer.c (add_struct_fields): Check type_name against NULL
diff --git a/gdb/solist.h b/gdb/solist.h
index 64754f34e9..56b09e3910 100644
--- a/gdb/solist.h
+++ b/gdb/solist.h
@@ -119,7 +119,9 @@ struct target_so_ops
 
     /* Given two so_list objects, one from the GDB thread list
        and another from the list returned by current_sos, return 1
-       if they represent the same library.  */
+       if they represent the same library.
+       Falls back to using strcmp on so_original_name field when set
+       to NULL.  */
     int (*same) (struct so_list *gdb, struct so_list *inferior);
   };