diff --git a/src/zxing/zxing/qrcode/encoder/MaskUtil.cpp b/src/zxing/zxing/qrcode/encoder/MaskUtil.cpp
index 0396c0f..82a3240 100644
--- a/src/zxing/zxing/qrcode/encoder/MaskUtil.cpp
+++ b/src/zxing/zxing/qrcode/encoder/MaskUtil.cpp
@@ -1,6 +1,7 @@
 #include "MaskUtil.h"
 #include <zxing/common/IllegalArgumentException.h>
 #include <stdlib.h>
+#include <algorithm> 
 
 namespace zxing {
 namespace qrcode {