diff --git a/test/input/bibacid-iso8859.bib b/test/input/bibacid-iso8859.bib
index b1dff94..a4a8f6d 100755
--- a/test/input/bibacid-iso8859.bib
+++ b/test/input/bibacid-iso8859.bib
@@ -196,6 +196,14 @@ MRREVIEWER = {Jean-Fran{\c{c}}ois Clouet},
  year = {2011},
 }
 
+%% bug reported by Mark Hereld
+@misc{mark,
+ title    = {Bug in Urls},
+ author   = {Mark Hereld},
+ howpublished   = {\url{http://foo.com/under_score.html}},
+ year = {2011},
+}
+
 
 
 
diff --git a/test/output/bibacid-iso8859.bib.txt b/test/output/bibacid-iso8859.bib.txt
index 84f8372..04477db 100755
--- a/test/output/bibacid-iso8859.bib.txt
+++ b/test/output/bibacid-iso8859.bib.txt
@@ -96,6 +96,15 @@ array (
   'type' => 'TECHREPORT',
   'year' => '1997',
 )
+array (
+  '_author' => 'Mark Hereld',
+  'author' => 'Mark Hereld',
+  'howpublished' => '<a href="http://foo.com/under_score.html">http://foo.com/under_score.html</a>',
+  'key' => 'mark',
+  'title' => 'Bug in Urls',
+  'type' => 'misc',
+  'year' => '2011',
+)
 array (
   '_author' => 'J. Abounader, D. Lamb',
   'author' => 'J. Abounader and D. Lamb',