diff --git a/src/Prowlarr.Api.V1/Indexers/NewznabController.cs b/src/Prowlarr.Api.V1/Indexers/NewznabController.cs
index e76bae68a..b5a7992e1 100644
--- a/src/Prowlarr.Api.V1/Indexers/NewznabController.cs
+++ b/src/Prowlarr.Api.V1/Indexers/NewznabController.cs
@@ -52,7 +52,7 @@ namespace NzbDrone.Api.V1.Indexers
                 throw new BadRequestException("Missing Function Parameter");
             }
 
-            request.imdbid = request.imdbid.TrimStart('t');
+            request.imdbid = request.imdbid?.TrimStart('t') ?? null;
 
             if (request.imdbid.IsNotNullOrWhiteSpace())
             {