diff --git a/app/views/wiki/tex.rhtml b/app/views/wiki/tex.rhtml
index 102b5112..ae39d4f0 100644
--- a/app/views/wiki/tex.rhtml
+++ b/app/views/wiki/tex.rhtml
@@ -199,7 +199,6 @@
 \newcommand{\conint}{\oint}
 \newcommand{\contourintegral}{\oint}
 \newcommand{\infinity}{\infty}
-\renewcommand{\empty}{\emptyset}
 \newcommand{\bottom}{\bot}
 \newcommand{\minusb}{\boxminus}
 \newcommand{\plusb}{\boxplus}
diff --git a/test/functional/wiki_controller_test.rb b/test/functional/wiki_controller_test.rb
index 4426ab89..9d67db89 100644
--- a/test/functional/wiki_controller_test.rb
+++ b/test/functional/wiki_controller_test.rb
@@ -1217,7 +1217,6 @@ class WikiControllerTest < ActionController::TestCase
 \newcommand{\conint}{\oint}
 \newcommand{\contourintegral}{\oint}
 \newcommand{\infinity}{\infty}
-\renewcommand{\empty}{\emptyset}
 \newcommand{\bottom}{\bot}
 \newcommand{\minusb}{\boxminus}
 \newcommand{\plusb}{\boxplus}