diff --git "a/api/src/routes/guilds/\043guild_id/members/\043member_id/index.ts" "b/api/src/routes/guilds/\043guild_id/members/\043member_id/index.ts"
index b6314ec..d923c10 100644
--- "a/api/src/routes/guilds/\043guild_id/members/\043member_id/index.ts"
+++ "b/api/src/routes/guilds/\043guild_id/members/\043member_id/index.ts"
@@ -35,9 +35,9 @@
 		member.roles = body.roles.map((x) => new Role({ id: x })); // foreign key constraint will fail if role doesn't exist
 	}
 
-	if (body.nick) {
+	if ('nick' in body) {
 		permission.hasThrow(req.user_id == member.user.id ? "CHANGE_NICKNAME" : "MANAGE_NICKNAMES");
-		member.nick = body.nick;
+		member.nick = body.nick?.trim() || undefined;
 	}
 
 	await member.save();