diff --git a/tests/index/racy.c b/tests/index/racy.c
index fda1ed239..3b26aabf4 100644
--- a/tests/index/racy.c
+++ b/tests/index/racy.c
@@ -3,6 +3,7 @@
 
 #include "buffer.h"
 #include "index.h"
+#include "repository.h"
 
 static git_repository *g_repo;