diff --git a/third_party/opencv/src/emd.cpp b/third_party/opencv/src/emd.cpp
index 30b19f676..834ebe9f4 100644
--- a/third_party/opencv/src/emd.cpp
+++ b/third_party/opencv/src/emd.cpp
@@ -59,6 +59,7 @@
 #ifdef CHROMIUM_OPENCV
 #include "emd_wrapper.h"
 
+#include <algorithm>
 #include <vector>
 #include <cassert>