diff --git a/.config/ags/services/gpt.js b/.config/ags/services/gpt.js
index b28e4ed9..4ea8316e 100644
--- a/.config/ags/services/gpt.js
+++ b/.config/ags/services/gpt.js
@@ -143,6 +143,7 @@ class GPTMessage extends Service {
     }
 
     addDelta(delta) {
+        if (delta == null) return;
         if (this.thinking) {
             this.thinking = false;
             this.content = delta;