diff --git a/source/detail/crypto/sha.cpp b/source/detail/crypto/sha.cpp
index 8d01cc07..39c9d638 100755
--- a/source/detail/crypto/sha.cpp
+++ b/source/detail/crypto/sha.cpp
@@ -21,6 +21,7 @@
 // @license: http://www.opensource.org/licenses/mit-license.php
 // @author: see AUTHORS file
 
+#include <algorithm>
 #include <array>
 #include <cstring>
 #include <iomanip>