branch: Add missing include
diff --git a/include/git2/branch.h b/include/git2/branch.h
index bbbdf1c..f072799 100644
--- a/include/git2/branch.h
+++ b/include/git2/branch.h
@@ -8,6 +8,7 @@
#define INCLUDE_git_branch_h__
#include "common.h"
+#include "oid.h"
#include "types.h"
/**