diff --git a/commons/src/main/java/org/archive/io/Arc2Warc.java b/commons/src/main/java/org/archive/io/Arc2Warc.java
index 74863392..844ed323 100644
--- a/commons/src/main/java/org/archive/io/Arc2Warc.java
+++ b/commons/src/main/java/org/archive/io/Arc2Warc.java
@@ -155,7 +155,7 @@ throws IOException {
            r.getHeaderString());
        ar.addLabelValue("ARC-File", 
            r.getMetaData().getArc());
-       ar.addLabelValue("ARC-Offset", 
+       ar.addLabelValue("ARC-Compressed-Offset", 
            String.valueOf(r.getHeader().getOffset()));
        ar.addLabelValue("ARC-Length", 
            String.valueOf(r.getHeader().getLength()));