diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 09efede70ef..7aadf4e6930 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2007-02-01  Geoffrey Keating  <geoffk@apple.com>
+
+	* config/rs6000/darwin.h (MD_UNWIND_SUPPORT): Don't define for
+	64-bit.
+
 2007-2-01   Seongbae Park <seongbae.park@gmail.com>
 
         PR inline-asm/28686
diff --git a/gcc/config/rs6000/darwin.h b/gcc/config/rs6000/darwin.h
index 28134f922db..48be0e994e9 100644
--- a/gcc/config/rs6000/darwin.h
+++ b/gcc/config/rs6000/darwin.h
@@ -449,7 +449,9 @@ do {									\
 #include <stdbool.h>
 #endif
 
+#ifndef __LP64__
 #define MD_UNWIND_SUPPORT "config/rs6000/darwin-unwind.h"
+#endif
 
 #define HAS_MD_FALLBACK_FRAME_STATE_FOR 1