diff --git a/src/Services/Users/AddEventService.php b/src/Services/Users/AddEventService.php
index a1b1a91..4d253fb 100644
--- a/src/Services/Users/AddEventService.php
+++ b/src/Services/Users/AddEventService.php
@@ -185,8 +185,8 @@ protected function prepareParams(): array
         if (($createdAt = $this->getCreatedAt()) !== null) {
             $result['created'] = $createdAt;
         }
-        if (($userId = $this->getUserId()) !== null) {
-            $result['by_user_id'] = $userId;
+        if ($this->isByUserId()) {
+            $result['by_user_id'] = true;
         }
 
         return $result;
diff --git a/src/Services/Users/SetPropertiesService.php b/src/Services/Users/SetPropertiesService.php
index 71f261e..c3e97b7 100644
--- a/src/Services/Users/SetPropertiesService.php
+++ b/src/Services/Users/SetPropertiesService.php
@@ -54,8 +54,8 @@ protected function getParams(): array
         $result = ['operations' => json_encode(array_map(function (IProperty $item) {
             return $item->toArray();
         }, $this->getProperties()))];
-        if (($userId = $this->getUserId()) !== null) {
-            $result['by_user_id'] = $userId;
+        if ($this->isByUserId()) {
+            $result['by_user_id'] = true;
         }
 
         return $result;