diff --git a/src/Orchard.Web/Modules/Orchard.Autoroute/Services/AutorouteService.cs b/src/Orchard.Web/Modules/Orchard.Autoroute/Services/AutorouteService.cs
index ff52a64e7..dbbb46979 100644
--- a/src/Orchard.Web/Modules/Orchard.Autoroute/Services/AutorouteService.cs
+++ b/src/Orchard.Web/Modules/Orchard.Autoroute/Services/AutorouteService.cs
@@ -180,7 +180,9 @@ namespace Orchard.Autoroute.Services {
         }
 
         public void RemoveAliases(AutoroutePart part) {
-            _aliasService.Delete(part.Path, AliasSource);
+            if (part != null) {
+                _aliasService.Delete(part.Path, AliasSource);
+            }
         }
 
         public string GenerateUniqueSlug(AutoroutePart part, IEnumerable<string> existingPaths) {