diff --git a/nova/api/openstack/compute/plugins/v3/servers.py b/nova/api/openstack/compute/plugins/v3/servers.py
index 3e3233dcb7c9..4d0d14a029e2 100644
--- a/nova/api/openstack/compute/plugins/v3/servers.py
+++ b/nova/api/openstack/compute/plugins/v3/servers.py
@@ -794,11 +794,7 @@ class ServersController(wsgi.Controller):
     @wsgi.action('rebuild')
     def _action_rebuild(self, req, id, body):
         """Rebuild an instance with the given attributes."""
-        try:
-            rebuild_dict = body['rebuild']
-        except (KeyError, TypeError):
-            msg = _('Invalid request body')
-            raise exc.HTTPBadRequest(explanation=msg)
+        rebuild_dict = body['rebuild']
 
         try:
             image_href = rebuild_dict["image_ref"]
diff --git a/nova/api/openstack/compute/servers.py b/nova/api/openstack/compute/servers.py
index 64be71d96fe9..863e89463d07 100644
--- a/nova/api/openstack/compute/servers.py
+++ b/nova/api/openstack/compute/servers.py
@@ -1304,11 +1304,7 @@ class Controller(wsgi.Controller):
     @wsgi.action('rebuild')
     def _action_rebuild(self, req, id, body):
         """Rebuild an instance with the given attributes."""
-        try:
-            body = body['rebuild']
-        except (KeyError, TypeError):
-            msg = _('Invalid request body')
-            raise exc.HTTPBadRequest(explanation=msg)
+        body = body['rebuild']
 
         try:
             image_href = body["imageRef"]