diff --git a/li.strolch.utils/src/main/java/li/strolch/utils/helper/ByteHelper.java b/li.strolch.utils/src/main/java/li/strolch/utils/helper/ByteHelper.java
index 7242567cf..cc410ae8c 100644
--- a/li.strolch.utils/src/main/java/li/strolch/utils/helper/ByteHelper.java
+++ b/li.strolch.utils/src/main/java/li/strolch/utils/helper/ByteHelper.java
@@ -234,6 +234,10 @@ public class ByteHelper {
 		return b;
 	}
 
+	public static byte invert(byte x) {
+		return (byte) (x ^ 0xff);
+	}
+
 	/**
 	 * Formats the given byte array to a binary string, separating each byte by a space
 	 *