diff --git a/util/sync_point.h b/util/sync_point.h
index 7827d286f..d1ef0349f 100644
--- a/util/sync_point.h
+++ b/util/sync_point.h
@@ -5,6 +5,7 @@
 #pragma once
 
 #include <condition_variable>
+#include <functional>
 #include <mutex>
 #include <string>
 #include <unordered_set>