diff --git a/src/BroDoc.cc b/src/BroDoc.cc
index 165f0d0237..5074c8b1e8 100644
--- a/src/BroDoc.cc
+++ b/src/BroDoc.cc
@@ -2,6 +2,7 @@
 #include <cstdarg>
 #include <string>
 #include <list>
+#include <algorithm>
 
 #include "BroDoc.h"
 #include "BroDocObj.h"