diff --git a/src/Ocelot/Configuration/Repository/FileConfigurationPoller.cs b/src/Ocelot/Configuration/Repository/FileConfigurationPoller.cs
index cca50d0b..9a2b67e6 100644
--- a/src/Ocelot/Configuration/Repository/FileConfigurationPoller.cs
+++ b/src/Ocelot/Configuration/Repository/FileConfigurationPoller.cs
@@ -105,7 +105,8 @@ namespace Ocelot.Configuration.Repository
 
         public void Dispose()
         {
-            _timer.Dispose();
+            _timer?.Dispose();
+            _timer = null;
         }
     }
 }