diff --git a/api/api-ktor/src/commonMain/kotlin/app/meetacy/sdk/engine/ktor/requests/users/UsersEngine.kt b/api/api-ktor/src/commonMain/kotlin/app/meetacy/sdk/engine/ktor/requests/users/UsersEngine.kt
index 8c22cc2..e517840 100644
--- a/api/api-ktor/src/commonMain/kotlin/app/meetacy/sdk/engine/ktor/requests/users/UsersEngine.kt
+++ b/api/api-ktor/src/commonMain/kotlin/app/meetacy/sdk/engine/ktor/requests/users/UsersEngine.kt
@@ -40,7 +40,7 @@ internal class UsersEngine(
         val response = httpClient.get(url.string) {
             apiVersion(request.apiVersion)
             token(request.token)
-            parameter("id", request.userId)
+            parameter("id", request.userId?.string)
         }.bodyAsSuccess<UserDetailsSerializable>()
         return GetUserRequest.Response(response.type())
     }