diff --git a/public/script.js b/public/script.js
index 89eaf90b7..09bf2f971 100644
--- a/public/script.js
+++ b/public/script.js
@@ -1259,7 +1259,7 @@ class StreamingProcessor {
 
     setFirstSwipe(messageId) {
         if (this.type !== 'swipe' && this.type !== 'impersonate') {
-            if (chat[messageId]['swipes'].length === 1 && chat[messageId]['swipe_id'] === 0) {
+            if (Array.isArray(chat[messageId]['swipes']) && chat[messageId]['swipes'].length === 1 && chat[messageId]['swipe_id'] === 0) {
                 chat[messageId]['swipes'][0] = chat[messageId]['mes'];
             }
         }