diff --git a/ts/editable/mathjax.ts b/ts/editable/mathjax.ts
index 1c340d138..bbc4b8006 100644
--- a/ts/editable/mathjax.ts
+++ b/ts/editable/mathjax.ts
@@ -70,7 +70,7 @@ export function convertMathjax(
  * Escape characters which are technically legal in Mathjax, but confuse HTML.
  */
 export function escapeSomeEntities(value: string): string {
-    return value.replace(/</g, "&lt;").replace(/>/g, "&gt;").replace(/&/g, "&amp;");
+    return value.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
 }
 
 export function unescapeSomeEntities(value: string): string {