Index: xmlcatalog.c
--- xmlcatalog.c.orig
+++ xmlcatalog.c
@@ -57,7 +57,7 @@ static char *filename = NULL;
 
 #ifdef LIBXML_SGML_CATALOG_ENABLED
 #ifndef XML_SGML_DEFAULT_CATALOG
-#define XML_SGML_DEFAULT_CATALOG XML_SYSCONFDIR "/sgml/catalog"
+#define XML_SGML_DEFAULT_CATALOG "file:///var/db/sgmlcatalog"
 #endif
 #endif
 
