diff --git a/unpacked/jax/output/NativeMML/config.js b/unpacked/jax/output/NativeMML/config.js
index 3206d4141..4104f6b3c 100644
--- a/unpacked/jax/output/NativeMML/config.js
+++ b/unpacked/jax/output/NativeMML/config.js
@@ -38,7 +38,7 @@ MathJax.OutputJax.NativeMML = MathJax.OutputJax({
                              //  (since the code for that is a bit delicate)
 
     styles: {
-      "DIV.MathJax_MathML": {
+      "div.MathJax_MathML": {
         "text-align": "center",
         margin: ".75em 0px"
       }