diff --git a/screenless/bureau/bureau.py b/screenless/bureau/bureau.py
index 8b1a9bf..492a1ed 100644
--- a/screenless/bureau/bureau.py
+++ b/screenless/bureau/bureau.py
@@ -357,11 +357,11 @@ class Bureau(object):
         fontconfig = FontConfiguration()
         fontsdir = os.path.join(self.mdir, "fonts")
         self.log.debug(fontsdir)
-        for font in glob.glob(fontsdir + "*.otf"):
+        for font in glob.glob(fontsdir + "/*.otf"):
             self.log.debug("adding font " + "file://" + font)
             fontconfig.add_font_face("file://" + font,
                                      weasyprint.default_url_fetcher)
-        for font in glob.glob(fontsdir + "*.ttf"):
+        for font in glob.glob(fontsdir + "/*.ttf"):
             self.log.debug("adding font " + "file://" + font)
             fontconfig.add_font_face("file://" + font,
                                      weasyprint.default_url_fetcher)