diff --git a/lib/utils.js b/lib/utils.js
index eccf5069..56a45cb0 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -33,6 +33,9 @@ function arrayString(val) {
     else if(Array.isArray(val[i])) {
       result = result + arrayString(val[i]);
     }
+    else if(val[i] instanceof Buffer) {
+      result += '\\\\x' + val[i].toString('hex');
+    }
     else
     {
       result += escapeElement(prepareValue(val[i]));