diff --git a/lib/asn1.js b/lib/asn1.js
index 83a28b3..c217aef 100644
--- a/lib/asn1.js
+++ b/lib/asn1.js
@@ -182,9 +182,9 @@ ASN1.tpl = function (asn1) {
           if (0x02 !== asn1.type && 0x03 !== asn1.type) {
             str += ", ";
           }
-          str += "opts.tpl" + i;
+          str += "Enc.bufToHex(opts.tpl" + i + ")";
         } else {
-          str += ", " + Enc.bufToHex(asn1.value);
+          str += ", '" + Enc.bufToHex(asn1.value) + "'";
         }
       }
       str += ")";