diff --git a/src/core/sal/Register.cc b/src/core/sal/Register.cc
index bf9f4e36..3f04a29c 100644
--- a/src/core/sal/Register.cc
+++ b/src/core/sal/Register.cc
@@ -1,3 +1,4 @@
+#include <algorithm>
 #include "Register.hpp"
 
 namespace fail {