diff --git a/redbot/cogs/warnings/warnings.py b/redbot/cogs/warnings/warnings.py
index 7301b306a..031032574 100644
--- a/redbot/cogs/warnings/warnings.py
+++ b/redbot/cogs/warnings/warnings.py
@@ -552,7 +552,9 @@ class Warnings(commands.Cog):
                     )
                 await ctx.send_interactive(
                     pagify(msg, shorten_by=58),
-                    box_lang=_("Warnings for {user}").format(user=user),
+                    box_lang=_("Warnings for {user}").format(
+                        user=user if isinstance(user, discord.Member) else user.id
+                    ),
                 )
 
     @commands.command()