diff --git a/src/dev/w1zzrd/asm/exception/DirectiveNotImplementedException.java b/src/dev/w1zzrd/asm/exception/DirectiveNotImplementedException.java
index 58a39ff..d69f16b 100644
--- a/src/dev/w1zzrd/asm/exception/DirectiveNotImplementedException.java
+++ b/src/dev/w1zzrd/asm/exception/DirectiveNotImplementedException.java
@@ -1,6 +1,6 @@
 package dev.w1zzrd.asm.exception;
 
-public class DirectiveNotImplementedException extends RuntimeException {
+public final class DirectiveNotImplementedException extends RuntimeException {
     public DirectiveNotImplementedException(String directiveName) {
         super("Operation not implemented: "+directiveName);
     }