diff --git a/src/core/lib/Base45.mjs b/src/core/lib/Base45.mjs
index 2a5d0927a..d3e279fab 100644
--- a/src/core/lib/Base45.mjs
+++ b/src/core/lib/Base45.mjs
@@ -24,4 +24,4 @@ export function highlightFromBase45(pos, args) {
     return pos;
 }
 
-export const ALPHABET = Utils.expandAlphRange("0-9A-Z $%*+-./:").join("");
+export const ALPHABET = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:";