diff --git a/ChangeLog b/ChangeLog
index 79491f54a..65bbdd6bc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,7 @@
 20091209
  - (dtucker) Wrap use of IPPROTO_IPV6 in an ifdef for platforms that don't
    have it.
+ - (dtucker) [defines.h] define PRIu64 for platforms that don't have it.
 
 20091208
  - (dtucker) OpenBSD CVS Sync
diff --git a/defines.h b/defines.h
index 2ddfd96d0..053893ee4 100644
--- a/defines.h
+++ b/defines.h
@@ -25,7 +25,7 @@
 #ifndef _DEFINES_H
 #define _DEFINES_H
 
-/* $Id: defines.h,v 1.156 2009/08/28 01:21:07 dtucker Exp $ */
+/* $Id: defines.h,v 1.157 2010/01/08 22:25:54 dtucker Exp $ */
 
 
 /* Constants */
@@ -753,4 +753,8 @@ struct winsize {
 # define SSH_IOBUFSZ 8192
 #endif
 
+#ifndef PRIu64
+# define PRIu64 "llu"
+#endif
+
 #endif /* _DEFINES_H */