diff --git a/src/Sonarr.Api.V3/Series/SeriesFolderAsRootFolderValidator.cs b/src/Sonarr.Api.V3/Series/SeriesFolderAsRootFolderValidator.cs
index 82413e356..3cf8e020b 100644
--- a/src/Sonarr.Api.V3/Series/SeriesFolderAsRootFolderValidator.cs
+++ b/src/Sonarr.Api.V3/Series/SeriesFolderAsRootFolderValidator.cs
@@ -31,7 +31,9 @@ namespace Sonarr.Api.V3.Series
 
             if (seriesFolder == rootFolder) return false;
 
-            return seriesFolder.LevenshteinDistance(rootFolder) <= Math.Max(1, seriesFolder.Length * 0.2);
+            var distance = seriesFolder.LevenshteinDistance(rootFolder);
+
+            return distance >= Math.Max(1, seriesFolder.Length * 0.2);
         }
     }
 }