diff --git a/hy/compiler.py b/hy/compiler.py
index 8882be3..81af3fd 100644
--- a/hy/compiler.py
+++ b/hy/compiler.py
@@ -203,7 +203,7 @@ class HyASTCompiler(object):
 
     @builds(HyInteger)
     def compile_number(self, number):
-        return ast.Num(n=number,
+        return ast.Num(n=int(number),  # See HyInteger above.
                        lineno=number.start_line,
                        col_offset=number.start_column)
 
diff --git a/tox.ini b/tox.ini
index ba3898e..1425e4c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,pypy,py32
+envlist = py27,pypy,py32,py26,py33
 [testenv]
 commands = nosetests
 deps =