diff --git a/src/core/operations/ParseASN1HexString.mjs b/src/core/operations/ParseASN1HexString.mjs
index a19ca70c..b3e0f652 100644
--- a/src/core/operations/ParseASN1HexString.mjs
+++ b/src/core/operations/ParseASN1HexString.mjs
@@ -46,7 +46,7 @@ class ParseASN1HexString extends Operation {
     run(input, args) {
         const [index, truncateLen] = args;
         return r.ASN1HEX.dump(input.replace(/\s/g, ""), {
-            "ommitLongOctet": truncateLen
+            "ommit_long_octet": truncateLen
         }, index);
     }