diff --git a/lib/filters/index.js b/lib/filters/index.js
index 75774e2..d86eba4 100644
--- a/lib/filters/index.js
+++ b/lib/filters/index.js
@@ -165,14 +165,13 @@ function cloneFilter (input) {
 }
 
 function escapedToHex (str) {
-  return str.replace(/\\([0-9a-f][^0-9a-f]|[0-9a-f]$|[^0-9a-f]|$)/gi, function (match, p1) {
+  return str.replace(/\\([0-9a-f](?![0-9a-f])|[^0-9a-f]|$)/gi, function (match, p1) {
     if (!p1) {
       return '\\5c'
     }
 
     const hexCode = p1.charCodeAt(0).toString(16)
-    const rest = p1.substring(1)
-    return '\\' + hexCode + rest
+    return '\\' + hexCode
   })
 }
 
diff --git a/package.json b/package.json
index d634b3b..786b84b 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,7 @@
   "name": "ldapjs",
   "homepage": "http://ldapjs.org",
   "description": "LDAP client and server APIs",
-  "version": "2.0.0-pre.1",
+  "version": "2.0.0-pre.2",
   "license": "MIT",
   "repository": {
     "type": "git",
diff --git a/test/filters/parse.test.js b/test/filters/parse.test.js
index 5eb6a94..bfe6607 100644
--- a/test/filters/parse.test.js
+++ b/test/filters/parse.test.js
@@ -26,6 +26,16 @@ test('GH-50 = in filter', function (t) {
   t.end()
 })
 
+test('convert to hex code', function (t) {
+  const str = 'foo=bar\\(abcd\\e\\fg\\h\\69\\a'
+  const f = parse(str)
+  t.ok(f)
+  t.equal(f.attribute, 'foo')
+  t.equal(f.value, 'bar(abcdefghia')
+  t.equal(f.toString(), '(foo=bar\\28abcdefghia)')
+  t.end()
+})
+
 test('( in filter', function (t) {
   const str = '(foo=bar\\()'
   const f = parse(str)
@@ -56,6 +66,16 @@ test('\\ in filter', function (t) {
   t.end()
 })
 
+test('not escaped \\ at end of filter', function (t) {
+  const str = 'foo=bar\\'
+  const f = parse(str)
+  t.ok(f)
+  t.equal(f.attribute, 'foo')
+  t.equal(f.value, 'bar\\')
+  t.equal(f.toString(), '(foo=bar\\5c)')
+  t.end()
+})
+
 test('* in equality filter', function (t) {
   const str = '(foo=bar\\*)'
   const f = parse(str)