diff --git a/src/controllers/accounts/posts.js b/src/controllers/accounts/posts.js
index b12b00be9f..46ae337a38 100644
--- a/src/controllers/accounts/posts.js
+++ b/src/controllers/accounts/posts.js
@@ -180,7 +180,7 @@ async function getPostsFromUserSet(template, req, res) {
 	// exposeUid returns -2 for all remote users for ease of processing, restoring uid
 	let { uid } = res.locals;
 	if (uid === -2) {
-		uid = await db.getObjectField('handle:uid', req.params.userslug);
+		uid = await db.getObjectField('handle:uid', req.params.userslug.toLowerCase());
 	}
 
 	const [{ username, userslug }, settings] = await Promise.all([
diff --git a/src/user/index.js b/src/user/index.js
index 971a2ab10d..3590c1c8ce 100644
--- a/src/user/index.js
+++ b/src/user/index.js
@@ -113,7 +113,7 @@ User.getUidByUserslug = async function (userslug) {
 
 	if (userslug.includes('@')) {
 		await activitypub.actors.assert(userslug);
-		return (await db.getObjectField('handle:uid', userslug)) || null;
+		return (await db.getObjectField('handle:uid', String(userslug).toLowerCase())) || null;
 	}
 
 	return await db.sortedSetScore('userslug:uid', userslug);