1 files changed, 3 insertions, 1 deletions
diff --git a/BKUApplet/src/main/java/at/gv/egiz/bku/online/applet/BKUWorker.java b/BKUApplet/src/main/java/at/gv/egiz/bku/online/applet/BKUWorker.java
index d5ba4e40..b11413d6 100644
--- a/BKUApplet/src/main/java/at/gv/egiz/bku/online/applet/BKUWorker.java
+++ b/BKUApplet/src/main/java/at/gv/egiz/bku/online/applet/BKUWorker.java
@@ -245,7 +245,9 @@ public class BKUWorker extends AbstractSMCCSTAL implements Runnable,
         log.error(e);
       }
     }
-    signatureCard.disconnect(false);
+    if (signatureCard != null) {
+      signatureCard.disconnect(false);
+    }
     QuitHandler.getInstance().unregisterHandlerInstance(this);
     sendRedirect();
   }