diff --git a/code/ryzom/client/src/interface_v3/chat_displayer.h b/code/ryzom/client/src/interface_v3/chat_displayer.h
index f98ed79f8..875859b78 100644
--- a/code/ryzom/client/src/interface_v3/chat_displayer.h
+++ b/code/ryzom/client/src/interface_v3/chat_displayer.h
@@ -25,6 +25,11 @@
 
 #include "nel/misc/mutex.h"
 
+// to fix a conflict with syslog.h being included by libwww
+#ifdef LOG_WARNING
+#undef LOG_WARNING
+#endif
+
 /**
  * class used to display console text commands in the chat window
  * \author Nicolas Brigand