diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 792c66ca5..a369f5535 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -185,6 +185,9 @@ static void cleanup_thread(void)
 #define deepest_delta_lock()
 #define deepest_delta_unlock()
 
+#define type_cas_lock()
+#define type_cas_unlock()
+
 #endif