diff --git a/code/ryzom/server/src/shard_unifier_service/ring_session_manager.cpp b/code/ryzom/server/src/shard_unifier_service/ring_session_manager.cpp
index 8088e14ca..cee3e4bf5 100644
--- a/code/ryzom/server/src/shard_unifier_service/ring_session_manager.cpp
+++ b/code/ryzom/server/src/shard_unifier_service/ring_session_manager.cpp
@@ -36,6 +36,11 @@
 #include "nel_database_mapping.h"
 #include "character_sync.h"
 
+// defined by MySQL config file
+#ifdef access
+#undef access
+#endif
+
 using namespace std;
 using namespace NLMISC;
 using namespace NLNET;