diff --git a/lib/querystring.js b/lib/querystring.js
index 8735d2814bc307..40677ffb0f0859 100644
--- a/lib/querystring.js
+++ b/lib/querystring.js
@@ -202,6 +202,7 @@ QueryString.stringify = QueryString.encode = function(obj, sep, eq, options) {
 QueryString.parse = QueryString.decode = function(qs, sep, eq, options) {
   sep = sep || '&';
   eq = eq || '=';
+  const eqLen = eq.length;
   var obj = {};
 
   if (typeof qs !== 'string' || qs.length === 0) {
@@ -235,7 +236,7 @@ QueryString.parse = QueryString.decode = function(qs, sep, eq, options) {
 
     if (idx >= 0) {
       k = decodeStr(x.substring(0, idx), decode);
-      v = decodeStr(x.substring(idx + 1), decode);
+      v = decodeStr(x.substring(idx + eqLen), decode);
     } else {
       k = decodeStr(x, decode);
       v = '';
diff --git a/test/parallel/test-querystring-multichar-separator.js b/test/parallel/test-querystring-multichar-separator.js
new file mode 100644
index 00000000000000..257492659bdfde
--- /dev/null
+++ b/test/parallel/test-querystring-multichar-separator.js
@@ -0,0 +1,24 @@
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+const qs = require('querystring');
+
+assert.deepEqual(
+  qs.parse('foo=>bar&&bar=>baz', '&&', '=>'),
+  {foo: 'bar', bar: 'baz'}
+);
+
+assert.strictEqual(
+  qs.stringify({foo: 'bar', bar: 'baz'}, '&&', '=>'),
+  'foo=>bar&&bar=>baz'
+);
+
+assert.deepEqual(
+  qs.parse('foo==>bar, bar==>baz', ', ', '==>'),
+  {foo: 'bar', bar: 'baz'}
+);
+
+assert.strictEqual(
+  qs.stringify({foo: 'bar', bar: 'baz'}, ', ', '==>'),
+  'foo==>bar, bar==>baz'
+);