diff --git a/src/Api/Controller/CreateDiscussionController.php b/src/Api/Controller/CreateDiscussionController.php
index 6c80bc6a9..a0205c21e 100644
--- a/src/Api/Controller/CreateDiscussionController.php
+++ b/src/Api/Controller/CreateDiscussionController.php
@@ -55,7 +55,7 @@ class CreateDiscussionController extends AbstractCreateController
         $actor = $request->getAttribute('actor');
 
         $discussion = $this->bus->dispatch(
-            new StartDiscussion($actor, array_get($request->getParsedBody(), 'data'))
+            new StartDiscussion($actor, array_get($request->getParsedBody(), 'data', []))
         );
 
         // After creating the discussion, we assume that the user has seen all
diff --git a/src/Api/Controller/CreateGroupController.php b/src/Api/Controller/CreateGroupController.php
index b33bf66a8..1b52dc218 100644
--- a/src/Api/Controller/CreateGroupController.php
+++ b/src/Api/Controller/CreateGroupController.php
@@ -41,7 +41,7 @@ class CreateGroupController extends AbstractCreateController
     protected function data(ServerRequestInterface $request, Document $document)
     {
         return $this->bus->dispatch(
-            new CreateGroup($request->getAttribute('actor'), array_get($request->getParsedBody(), 'data'))
+            new CreateGroup($request->getAttribute('actor'), array_get($request->getParsedBody(), 'data', []))
         );
     }
 }
diff --git a/src/Api/Controller/CreatePostController.php b/src/Api/Controller/CreatePostController.php
index f09120549..ab054cc3c 100644
--- a/src/Api/Controller/CreatePostController.php
+++ b/src/Api/Controller/CreatePostController.php
@@ -52,7 +52,7 @@ class CreatePostController extends AbstractCreateController
     protected function data(ServerRequestInterface $request, Document $document)
     {
         $actor = $request->getAttribute('actor');
-        $data = array_get($request->getParsedBody(), 'data');
+        $data = array_get($request->getParsedBody(), 'data', []);
         $discussionId = array_get($data, 'relationships.discussion.data.id');
         $ipAddress = array_get($request->getServerParams(), 'REMOTE_ADDR', '127.0.0.1');
 
diff --git a/src/Api/Controller/CreateUserController.php b/src/Api/Controller/CreateUserController.php
index 4869800e5..2ced51c21 100644
--- a/src/Api/Controller/CreateUserController.php
+++ b/src/Api/Controller/CreateUserController.php
@@ -41,7 +41,7 @@ class CreateUserController extends AbstractCreateController
     protected function data(ServerRequestInterface $request, Document $document)
     {
         return $this->bus->dispatch(
-            new RegisterUser($request->getAttribute('actor'), array_get($request->getParsedBody(), 'data'))
+            new RegisterUser($request->getAttribute('actor'), array_get($request->getParsedBody(), 'data', []))
         );
     }
 }