diff --git a/mercurial/parsers.c b/mercurial/parsers.c
--- a/mercurial/parsers.c
+++ b/mercurial/parsers.c
@@ -137,6 +137,7 @@ quit:
 /* msvc 6.0 has problems */
 #  define inline __inline
 typedef unsigned long uint32_t;
+typedef unsigned __int64 uint64_t;
 # else
 #  include <stdint.h>
 # endif