diff --git a/Models/Flags.cs b/Models/Flags.cs
index 5478b3b..399a87c 100644
--- a/Models/Flags.cs
+++ b/Models/Flags.cs
@@ -32,7 +32,7 @@ namespace Kasbot.Models
                             if (command.Contains(name))
                             {
                                 prop.SetValue(this, true);
-                                result.Replace(name, string.Empty);
+                                result = result.Replace(name, string.Empty);
                             }
                         });
                     }