diff --git a/core/activitypub_util.js b/core/activitypub_util.js
index ba8f23c5..5e3259e0 100644
--- a/core/activitypub_util.js
+++ b/core/activitypub_util.js
@@ -45,6 +45,10 @@ function selfUrl(webServer, user) {
 }
 
 function userFromAccount(accountName, cb) {
+    if (accountName.startsWith('@')) {
+        accountName = accountName.slice(1);
+    }
+
     User.getUserIdAndName(accountName, (err, userId) => {
         if (err) {
             return cb(err);
@@ -58,7 +62,7 @@ function userFromAccount(accountName, cb) {
             const accountStatus = user.getPropertyAsNumber(UserProps.AccountStatus);
             if (
                 User.AccountStatus.disabled == accountStatus ||
-                User.AccountStatus.inactive == accountStatus
+        User.AccountStatus.inactive == accountStatus
             ) {
                 return cb(Errors.AccessDenied('Account disabled', ErrorReasons.Disabled));
             }
diff --git a/core/servers/content/web_handlers/activitypub.js b/core/servers/content/web_handlers/activitypub.js
index 7c3ffa0d..7fec6644 100644
--- a/core/servers/content/web_handlers/activitypub.js
+++ b/core/servers/content/web_handlers/activitypub.js
@@ -66,7 +66,8 @@ exports.getModule = class ActivityPubWebHandler extends WebHandlerModule {
             }
 
             const accept = req.headers['accept'] || '*/*';
-            if (accept === 'application/activity+json') {
+            const headerValues = ['application/activity+json', 'application/ld+json', 'application/json'];
+            if (headerValues.some(mime => accept.includes(mime))) {
                 sendActor = true;
             }
 
@@ -81,14 +82,14 @@ exports.getModule = class ActivityPubWebHandler extends WebHandlerModule {
     }
 
     _selfAsActorHandler(user, req, resp) {
-        const selfUrl = selfUrl(this.webServer, user);
+        const sUrl = selfUrl(this.webServer, user);
 
         const bodyJson = {
             '@context': [
                 'https://www.w3.org/ns/activitystreams',
                 'https://w3id.org/security/v1',
             ],
-            id: selfUrl,
+            id: sUrl,
             type: 'Person',
             preferredUsername: user.username,
             name: user.getSanitizedName('real'),
@@ -108,7 +109,7 @@ exports.getModule = class ActivityPubWebHandler extends WebHandlerModule {
         const publicKeyPem = user.getProperty(UserProps.PublicKeyMain);
         if (!_.isEmpty(publicKeyPem)) {
             bodyJson['publicKey'] = {
-                id: selfUrl + '#main-key',
+                id: sUrl + '#main-key',
                 owner: sUrl,
                 publicKeyPem: user.getProperty(UserProps.PublicKeyMain),
             };