diff --git a/src/main/scala/li/cil/oc/server/component/InternetCard.scala b/src/main/scala/li/cil/oc/server/component/InternetCard.scala
index ba33e2842..5faac807a 100644
--- a/src/main/scala/li/cil/oc/server/component/InternetCard.scala
+++ b/src/main/scala/li/cil/oc/server/component/InternetCard.scala
@@ -246,6 +246,7 @@ object InternetCard {
     private val id = UUID.randomUUID()
 
     private def setupSelector() {
+      if (channel == null) return
       TCPNotifier.add((channel, () => {
         owner match {
           case Some(internetCard) =>