diff --git a/src/transaction.c b/src/transaction.c
index 7b45b8bf2..e8331891c 100644
--- a/src/transaction.c
+++ b/src/transaction.c
@@ -13,6 +13,7 @@
 #include "reflog.h"
 #include "signature.h"
 
+#include "git2/transaction.h"
 #include "git2/signature.h"
 #include "git2/sys/refs.h"
 #include "git2/sys/refdb_backend.h"