diff --git a/code/nel/include/nel/misc/entity_id.h b/code/nel/include/nel/misc/entity_id.h
index 25c744f4e..0a3d51208 100644
--- a/code/nel/include/nel/misc/entity_id.h
+++ b/code/nel/include/nel/misc/entity_id.h
@@ -580,7 +580,7 @@ struct CEntityIdHashMapTraits
 	size_t operator() (const NLMISC::CEntityId &id ) const
 	{
 		uint64 hash64 = id.getUniqueId();
-#if (HAVE_X86_64)
+#ifdef HAVE_X86_64
 		return (size_t)hash64;
 #else
 		return (size_t)hash64 ^ (size_t)(hash64 >> 32);