diff --git a/src/git2/index.h b/src/git2/index.h
index f1716fead..605740c10 100644
--- a/src/git2/index.h
+++ b/src/git2/index.h
@@ -27,6 +27,7 @@
 
 #include "common.h"
 #include "types.h"
+#include "oid.h"
 
 /**
  * @file git2/index.h
diff --git a/src/git2/refs.h b/src/git2/refs.h
index c9efac34f..36031ec66 100644
--- a/src/git2/refs.h
+++ b/src/git2/refs.h
@@ -27,6 +27,7 @@
 
 #include "common.h"
 #include "types.h"
+#include "oid.h"
 
 /**
  * @file git2/refs.h