diff --git a/doc/sandbox.mdwn b/doc/sandbox.mdwn
index 124cdec12..f9fa321b3 100644
--- a/doc/sandbox.mdwn
+++ b/doc/sandbox.mdwn
@@ -1,5 +1,3 @@
-[[!mathjax ]] 
-$E=mc^2$
 
 This is the [[SandBox]], a page anyone can edit to try out ikiwiki
 (version [[!version  ]]).