diff --git a/src/Infrastructure/BotSharp.Core/Users/Services/UserService.cs b/src/Infrastructure/BotSharp.Core/Users/Services/UserService.cs
index 65efbfd1..1fe13eda 100644
--- a/src/Infrastructure/BotSharp.Core/Users/Services/UserService.cs
+++ b/src/Infrastructure/BotSharp.Core/Users/Services/UserService.cs
@@ -56,7 +56,7 @@ public class UserService : IUserService
 
         record = user;
         record.Email = user.Email?.ToLower();
-        if (user.Phone != null)
+        if (!string.IsNullOrWhiteSpace(user.Phone))
         {
             record.Phone = "+" + Regex.Match(user.Phone, @"\d+").Value;
         }