diff --git a/linkchecker b/linkchecker
index a27fb254..72319db8 100755
--- a/linkchecker
+++ b/linkchecker
@@ -638,7 +638,9 @@ assert None == linkcheck.log.debug(linkcheck.LOG_CMDLINE,
 # warn about sitemap loggers and verbose output
 klasses = [c.__class__ for c in [config['logger']] + config['fileoutput']]
 if (linkcheck.logger.gml.GMLLogger in klasses or \
-    linkcheck.logger.dot.DOTLogger in klasses) and not config['verbose']:
+    linkcheck.logger.dot.DOTLogger in klasses or \
+    linkcheck.logger.gxml.GraphXMLLogger in klasses) and \
+   not config['verbose']:
     linkcheck.log.warn(linkcheck.LOG_CMDLINE,
            _("Using DOT or GML loggers without verbose output"
              " gives an incomplete sitemap graph."))