Index: markup/tests/template.py
===================================================================
--- markup/tests/template.py    (revision 79)
+++ markup/tests/template.py    (working copy)
@@ -421,6 +421,11 @@
         tmpl = Template('<root attr="${1}"/>')
         self.assertEqual('<root attr="1"/>', str(tmpl.generate(ctxt)))

+    def test_empty_attr(self):
+        ctxt = Context()
+        tmpl = Template('<root attr=""/>')
+        self.assertEqual('<root attr=""/>', str(tmpl.generate(ctxt)))
+
     def test_bad_directive_error(self):
         xml = '<p xmlns:py="http://markup.edgewall.org/" py:do="nothing" />'
         try:
Index: markup/template.py
===================================================================
--- markup/template.py  (revision 79)
+++ markup/template.py  (working copy)
@@ -765,6 +765,8 @@
         @param offset: the column number at which the text starts in the source
             (optional)
         """
+        if text == '':
+            return  iter([(TEXT, '', (filename, lineno, offset))])
         def _interpolate(text, patterns):
             for idx, group in enumerate(patterns.pop(0).split(text)):
                 if idx % 2: