diff --git a/libobjc/ChangeLog b/libobjc/ChangeLog
index c10832bccc5..232da9cadb4 100644
--- a/libobjc/ChangeLog
+++ b/libobjc/ChangeLog
@@ -1,3 +1,7 @@
+2004-09-16  Andrew Pinski  <apinski@apple.com>
+
+	* encoding.c (ALTIVEC_VECTOR_MODE): Define a bogus macro.
+
 2004-08-28  Nathanael Nerode  <neroden@gcc.gnu.org>
 
 	* configure.ac: Switch from _GCC_TOPLEV_NONCANONICAL_TARGET to
diff --git a/libobjc/encoding.c b/libobjc/encoding.c
index dba203204b6..7f71276b556 100644
--- a/libobjc/encoding.c
+++ b/libobjc/encoding.c
@@ -92,6 +92,11 @@ Boston, MA 02111-1307, USA.  */
 #define target_flags not_target_flags
 static int __attribute__ ((__unused__)) not_target_flags = 0;
 
+/* Some ROUND_TYPE_ALIGN use ALTIVEC_VECTOR_MODE (rs6000 darwin).
+   Define a dummy ALTIVEC_VECTOR_MODE so it will not die.  */
+#undef ALTIVEC_VECTOR_MODE
+#define ALTIVEC_VECTOR_MODE(MODE) (0)
+
 
 /*  FIXME: while this file has no business including tm.h, this
     definitely has no business defining this macro but it