diff --git a/discord/embeds.py b/discord/embeds.py
index 88123cbcf..7b4ecccb1 100644
--- a/discord/embeds.py
+++ b/discord/embeds.py
@@ -512,7 +512,7 @@ class Embed:
                 if timestamp.tzinfo:
                     result['timestamp'] = timestamp.astimezone(tz=datetime.timezone.utc).isoformat()
                 else:
-                    result['timestamp'] = timestamp.replace(tzinfo=timezone.utc).isoformat()
+                    result['timestamp'] = timestamp.replace(tzinfo=datetime.timezone.utc).isoformat()
 
         # add in the non raw attribute ones
         if self.type: