diff --git a/lib/rails23_ruby193_fixnum_monkey_patch.rb b/lib/rails23_ruby193_fixnum_monkey_patch.rb
new file mode 100644
index 0000000..edea233
--- /dev/null
+++ b/lib/rails23_ruby193_fixnum_monkey_patch.rb
@@ -0,0 +1,7 @@
+class Fixnum
+  # actionpack-2.3.18/lib/action_controller/assertions/selector_assertions.rb:276
+  # attempts to get encoding of Fixnum when doing has_tag "foo", :text => 3
+  def encoding
+    Encoding::UTF_8
+  end
+end
--
libgit2 0.21.2