diff --git a/redbot/core/core_commands.py b/redbot/core/core_commands.py
index ec1299eb6..ad9b7e873 100644
--- a/redbot/core/core_commands.py
+++ b/redbot/core/core_commands.py
@@ -1919,6 +1919,9 @@ class Core(commands.commands._RuleDropper, commands.Cog, CoreLogic):
     async def _username(self, ctx: commands.Context, *, username: str):
         """Sets [botname]'s username."""
         try:
+            if len(username) > 32:
+                await ctx.send(_("Failed to change name. Must be 32 characters or fewer."))
+                return
             await self._name(name=username)
         except discord.HTTPException:
             await ctx.send(
@@ -1938,6 +1941,9 @@ class Core(commands.commands._RuleDropper, commands.Cog, CoreLogic):
     async def _nickname(self, ctx: commands.Context, *, nickname: str = None):
         """Sets [botname]'s nickname."""
         try:
+            if len(nickname) > 32:
+                await ctx.send(_("Failed to change nickname. Must be 32 characters or fewer."))
+                return
             await ctx.guild.me.edit(nick=nickname)
         except discord.Forbidden:
             await ctx.send(_("I lack the permissions to change my own nickname."))