diff --git a/src/Elmah.Io.HResults/Facility/FacilityUrt.cs b/src/Elmah.Io.HResults/Facility/FacilityUrt.cs
index c8b554e..5da705c 100644
--- a/src/Elmah.Io.HResults/Facility/FacilityUrt.cs
+++ b/src/Elmah.Io.HResults/Facility/FacilityUrt.cs
@@ -13,7 +13,7 @@ public FacilityUrt() : base("FACILITY_URT")
                 case 5632: return "COR_E_APPLICATION";
             }
 
-            return null;
+            return $"{errorCode}";
         }
     }
 }