diff --git a/src/NzbDrone.Core/Indexers/Definitions/Cardigann/CardigannDefinition.cs b/src/NzbDrone.Core/Indexers/Definitions/Cardigann/CardigannDefinition.cs
index 9b00b4043..72d15a16c 100644
--- a/src/NzbDrone.Core/Indexers/Definitions/Cardigann/CardigannDefinition.cs
+++ b/src/NzbDrone.Core/Indexers/Definitions/Cardigann/CardigannDefinition.cs
@@ -29,6 +29,11 @@ namespace NzbDrone.Core.Indexers.Cardigann
     // Cardigann yaml classes
     public class CardigannDefinition
     {
+        public CardigannDefinition()
+        {
+            Legacylinks = new List<string>();
+        }
+
         public string Id { get; set; }
         public List<SettingsField> Settings { get; set; }
         public string Name { get; set; }
diff --git a/src/NzbDrone.Core/Indexers/Definitions/Cardigann/CardigannMetaDef.cs b/src/NzbDrone.Core/Indexers/Definitions/Cardigann/CardigannMetaDef.cs
index 18d6ac4e3..32ca9ee67 100644
--- a/src/NzbDrone.Core/Indexers/Definitions/Cardigann/CardigannMetaDef.cs
+++ b/src/NzbDrone.Core/Indexers/Definitions/Cardigann/CardigannMetaDef.cs
@@ -4,6 +4,11 @@ namespace NzbDrone.Core.Indexers.Cardigann
 {
     public class CardigannMetaDefinition
     {
+        public CardigannMetaDefinition()
+        {
+            Legacylinks = new List<string>();
+        }
+
         public string Id { get; set; }
         public string File { get; set; }
         public string Name { get; set; }