diff --git a/DAPNETGateway.cpp b/DAPNETGateway.cpp
index 89839ed..492d148 100644
--- a/DAPNETGateway.cpp
+++ b/DAPNETGateway.cpp
@@ -47,6 +47,7 @@ const char* DEFAULT_INI_FILE = "/etc/DAPNETGateway.ini";
 #include <clocale>
 #include <cassert>
 #include <cmath>
+#include <algorithm>
 
 const unsigned int FRAME_LENGTH_CODEWORDS    = 2U;
 const unsigned int BATCH_LENGTH_CODEWORDS    = 17U;