diff --git a/unpacked/jax/input/TeX/jax.js b/unpacked/jax/input/TeX/jax.js
index 3e761bedd..825751f3d 100644
--- a/unpacked/jax/input/TeX/jax.js
+++ b/unpacked/jax/input/TeX/jax.js
@@ -421,7 +421,8 @@
       
       remap: {
         '-':   '2212',
-        '*':   '2217'
+        '*':   '2217',
+        '`':   '2018',  // map ` to back quote
       },
     
       mathchar0mi: {