diff --git a/gcc/config/rs6000/aix53.h b/gcc/config/rs6000/aix53.h
index 49c09edced5..f599508a6f5 100644
--- a/gcc/config/rs6000/aix53.h
+++ b/gcc/config/rs6000/aix53.h
@@ -1,5 +1,5 @@
 /* Definitions of target machine for GNU compiler,
-   for IBM RS/6000 POWER running AIX V5.2.
+   for IBM RS/6000 POWER running AIX V5.3.
    Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
    Free Software Foundation, Inc.
    Contributed by David Edelsohn (edelsohn@gnu.org).