diff --git a/src/dorkbox/systemTray/util/EventDispatch.java b/src/dorkbox/systemTray/util/EventDispatch.java
index e9927aa..9ae2818 100644
--- a/src/dorkbox/systemTray/util/EventDispatch.java
+++ b/src/dorkbox/systemTray/util/EventDispatch.java
@@ -31,7 +31,9 @@ class EventDispatch {
      */
     public static synchronized
     void shutdown() {
-        eventDispatchExecutor.shutdownNow();
-        eventDispatchExecutor = null;
+        if (eventDispatchExecutor != null) {
+            eventDispatchExecutor.shutdownNow();
+            eventDispatchExecutor = null;
+        }
     }
 }