diff --git a/CHANGELOG.md b/CHANGELOG.md
index c47d6338..01af666a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -33,6 +33,7 @@
 - [#703](https://github.com/estruyf/vscode-front-matter/issues/703): Fix retrieval of Astro Collections for `pnpm` projects
 - [#704](https://github.com/estruyf/vscode-front-matter/issues/704): Fix `zod` schema script for optional fields
 - [#707](https://github.com/estruyf/vscode-front-matter/issues/707): Fix `clearEmpty` issue with `draft` and `boolean` fields which are by default set to `true`
+- [#711](https://github.com/estruyf/vscode-front-matter/issues/711): Fix in character mapping in the slug field
 - [#712](https://github.com/estruyf/vscode-front-matter/issues/712): Keep the search context when deleting media files
 
 ## [9.3.1] - 2023-10-27
diff --git a/src/helpers/SlugHelper.ts b/src/helpers/SlugHelper.ts
index af106a54..de3b7177 100644
--- a/src/helpers/SlugHelper.ts
+++ b/src/helpers/SlugHelper.ts
@@ -64,6 +64,6 @@ export class SlugHelper {
    */
   private static replaceCharacters(value: string) {
     const characters = [...value];
-    return characters.map((c) => charMap[c] || c).join('');
+    return characters.map((c) => (typeof charMap[c] === 'string' ? charMap[c] : c)).join('');
   }
 }