diff --git a/public/scripts/slash-commands.js b/public/scripts/slash-commands.js
index f018e5f9b..90bd90a6d 100644
--- a/public/scripts/slash-commands.js
+++ b/public/scripts/slash-commands.js
@@ -3129,7 +3129,7 @@ export async function sendMessageAs(args, text) {
     const character = characters.find(x => x.avatar === name) ?? characters.find(x => x.name === name);
     let force_avatar, original_avatar;
 
-    if (characters[this_chid] === character) {
+    if (this_chid !== undefined && characters[this_chid] === character) {
         // If the targeted character is the currently selected one in a solo chat, we don't need to force any avatars
     }
     else if (character && character.avatar !== 'none') {