--- a/doc/text-templates.txt
+++ b/doc/text-templates.txt
@@ -215,7 +215,7 @@
 
 .. code-block:: genshitext
 
-  {% include '%s.txt' % filename %}
+  {% include ${'%s.txt' % filename} %}
 
 Note that a ``TemplateNotFound`` exception is raised if an included file can't
 be found.
@@ -349,10 +349,12 @@
 comments are lines that start with two ``#`` characters, and a line-break at the
 end of a directive is removed automatically.
 
-.. note:: If you're using this old syntax, it is strongly recommended to migrate
-          to the new syntax. Simply replace any references to ``TextTemplate``
-          by ``NewTextTemplate``. On the other hand, if you want to stick with
-          the old syntax for a while longer, replace references to
+.. note:: If you're using this old syntax, it is strongly recommended to
+          migrate to the new syntax. Simply replace any references to
+          ``TextTemplate`` by ``NewTextTemplate`` (and also change the
+          text templates, of course). On the other hand, if you want to stick
+          with the old syntax for a while longer, replace references to
           ``TextTemplate`` by ``OldTextTemplate``; while ``TextTemplate`` is
           still an alias for the old language at this point, that will change
-          in a future release.
+          in a future release. But also note that the old syntax may be
+          dropped entirely in a future release.

--- a/genshi/template/tests/text.py
+++ b/genshi/template/tests/text.py
@@ -232,6 +232,27 @@
 Included
 ----- Included data above this line -----""", tmpl.generate().render())
 
+    def test_include_expr(self):
+         file1 = open(os.path.join(self.dirname, 'tmpl1.txt'), 'w')
+         try:
+             file1.write("Included")
+         finally:
+             file1.close()
+ 
+         file2 = open(os.path.join(self.dirname, 'tmpl2.txt'), 'w')
+         try:
+             file2.write("""----- Included data below this line -----
+    {% include ${'%s.txt' % ('tmpl1',)} %}
+    ----- Included data above this line -----""")
+         finally:
+             file2.close()
+
+         loader = TemplateLoader([self.dirname])
+         tmpl = loader.load('tmpl2.txt', cls=NewTextTemplate)
+         self.assertEqual("""----- Included data below this line -----
+    Included
+    ----- Included data above this line -----""", tmpl.generate().render())
+
 
 def suite():
     suite = unittest.TestSuite()

--- a/genshi/template/text.py
+++ b/genshi/template/text.py
@@ -28,6 +28,7 @@
 
 import re
 
+from genshi.core import TEXT
 from genshi.template.base import BadDirectiveError, Template, \
                                  TemplateSyntaxError, EXEC, INCLUDE, SUB
 from genshi.template.eval import Suite
@@ -188,7 +189,11 @@
 
             if command == 'include':
                 pos = (self.filename, lineno, 0)
-                stream.append((INCLUDE, (value.strip(), None, []), pos))
+                value = list(interpolate(value, self.basedir, self.filename,
+                                         lineno, 0, lookup=self.lookup))
+                if len(value) == 1 and value[0][0] is TEXT:
+                    value = value[0][1]
+                stream.append((INCLUDE, (value, None, []), pos))
 
             elif command == 'python':
                 if not self.allow_exec: