--- core.c	(revision 1332524)
+++ core.c	(working copy)
@@ -1421,7 +1421,7 @@ 
         if (cmd->server->is_virtual) {
             ap_log_perror(APLOG_MARK, APLOG_STARTUP, 0,
                           cmd->pool, APLOGNO(00112)
-                          "Warning: DocumentRoot [%s] does not exist",
+                          "Warning: DocumentRoot [%s] does not exist or is not a directory",
                           arg);
             conf->ap_document_root = arg;
         }