diff --git a/flow/Util.h b/flow/Util.h
index 6e904a3f34..2e3649156f 100644
--- a/flow/Util.h
+++ b/flow/Util.h
@@ -22,6 +22,8 @@
 #define _FLOW_UTIL_H_
 #pragma once
 
+#include <algorithm>
+
 template <typename C>
 void swapAndPop(C* container, int index) {
 	if (index != container->size()-1) {