diff --git a/src/main/scala/li/cil/oc/common/asm/ClassTransformer.scala b/src/main/scala/li/cil/oc/common/asm/ClassTransformer.scala
index 1c7ff8d53..3fcd4065a 100644
--- a/src/main/scala/li/cil/oc/common/asm/ClassTransformer.scala
+++ b/src/main/scala/li/cil/oc/common/asm/ClassTransformer.scala
@@ -134,7 +134,8 @@ class ClassTransformer extends IClassTransformer {
         {
           val classNode = newClassNode(transformedClass)
           if (classNode.interfaces.contains("li/cil/oc/api/network/SimpleComponent") &&
-            !classNode.visibleAnnotations.exists(_.desc == "Lli/cil/oc/api/network/SimpleComponent$SkipInjection;")) {
+            (classNode.visibleAnnotations == null || !classNode.visibleAnnotations.
+              exists(annotation => annotation != null && annotation.desc == "Lli/cil/oc/api/network/SimpleComponent$SkipInjection;"))) {
             try {
               transformedClass = injectEnvironmentImplementation(classNode)
               log.info(s"Successfully injected component logic into class $name.")