diff --git a/RotationSolver/Updaters/RotationUpdater.cs b/RotationSolver/Updaters/RotationUpdater.cs
index be3b2e024..b5ac40ed3 100644
--- a/RotationSolver/Updaters/RotationUpdater.cs
+++ b/RotationSolver/Updaters/RotationUpdater.cs
@@ -204,6 +204,7 @@ public static void LocalRotationWatcher()
 
         foreach (var dir in dirs)
         {
+            if (string.IsNullOrWhiteSpace(dir)) continue;
             var dlls = Directory.GetFiles(dir, "*.dll");
             
             foreach (var dll in dlls)