1 files changed, 1 insertions, 1 deletions
diff --git a/defines.h b/defines.h
index b3371d4b2f..9e26a2522b 100644
--- a/defines.h
+++ b/defines.h
@@ -230,7 +230,7 @@ flush_register_windows(void)
 	;
 }
 #  define FLUSH_REGISTER_WINDOWS flush_register_windows()
-#elif defined(IA64)
+#elif defined(__ia64)
 void *rb_ia64_bsp(void);
 void rb_ia64_flushrs(void);
 #  define FLUSH_REGISTER_WINDOWS rb_ia64_flushrs()