diff --git a/app/views/wiki/tex.rhtml b/app/views/wiki/tex.rhtml
index c4b5563c..0c5b8380 100644
--- a/app/views/wiki/tex.rhtml
+++ b/app/views/wiki/tex.rhtml
@@ -4,6 +4,7 @@
 \usepackage{amsfonts}
 \usepackage{amssymb}
 \usepackage{amsthm}
+\usepackage{mathtools}
 <%- if @tex_content =~  /\\mathbb\{[^}]*[a-z0-9]+[^}]*\}/ -%>
 \usepackage{mathbbol}
 <% end -%>
diff --git a/test/functional/wiki_controller_test.rb b/test/functional/wiki_controller_test.rb
index 1a18af7d..dde7b9fe 100755
--- a/test/functional/wiki_controller_test.rb
+++ b/test/functional/wiki_controller_test.rb
@@ -930,6 +930,7 @@ class WikiControllerTest < ActionController::TestCase
 \usepackage{amsfonts}
 \usepackage{amssymb}
 \usepackage{amsthm}
+\usepackage{mathtools}
 !
     @tex_header2 = %q!\usepackage{graphicx}
 \usepackage{color}
diff --git a/test/unit/page_renderer_test.rb b/test/unit/page_renderer_test.rb
index 7975869c..3cbd2967 100644
--- a/test/unit/page_renderer_test.rb
+++ b/test/unit/page_renderer_test.rb
@@ -211,6 +211,13 @@ END_THM
   end
   
   def test_have_latest_itex2mml  
+
+      assert_markup_parsed_as(
+        %{<p>equation <math class='maruku-mathml' displa} +
+        %{y='inline' xmlns='http://www.w3.org/1998/Math/} +
+        %{MathML'><mi>A</mi><mo>\342\211\224</mo><mi>B</} +
+        %{mi></math></p>},
+        "equation $A \\coloneqq B$")
   
       assert_markup_parsed_as(
         %{<p>equation <math class='maruku-mathml' displa} +