thodg/libgit2

diff --git a/include/git2/object.h b/include/git2/object.h
index 2045dd8..984dbb7 100644
--- a/include/git2/object.h
+++ b/include/git2/object.h
@@ -21,6 +21,8 @@
  */
 GIT_BEGIN_DECL
 
+#define GIT_OBJECT_SIZE_MAX UINT64_MAX
+
 /**
  * Lookup a reference to one of the objects in a repository.
  *
diff --git a/include/git2/types.h b/include/git2/types.h
index de9ee43..ade0c7d 100644
--- a/include/git2/types.h
+++ b/include/git2/types.h
@@ -63,6 +63,9 @@ typedef int64_t git_time_t; /**< time in seconds from epoch */
 
 #endif
 
+/** The maximum size of an object */
+typedef uint64_t git_object_size_t;
+
 #include "buffer.h"
 #include "oid.h"