diff --git a/lib/handlebars/compiler/javascript-compiler.js b/lib/handlebars/compiler/javascript-compiler.js
index cc26eb240..b21df1d8a 100644
--- a/lib/handlebars/compiler/javascript-compiler.js
+++ b/lib/handlebars/compiler/javascript-compiler.js
@@ -543,7 +543,7 @@ JavaScriptCompiler.prototype = {
     if (this.hash) {
       this.hashes.push(this.hash);
     }
-    this.hash = {values: [], types: [], contexts: [], ids: []};
+    this.hash = {values: {}, types: [], contexts: [], ids: []};
   },
   popHash: function() {
     let hash = this.hash;
diff --git a/spec/regressions.js b/spec/regressions.js
index 58db65bcd..a8879067e 100644
--- a/spec/regressions.js
+++ b/spec/regressions.js
@@ -323,4 +323,15 @@ describe('Regressions', function() {
         }, 'useData': true});
     }
   });
+
+  it('should allow hash with protected array names', function() {
+    var obj = {array: [1], name: 'John'};
+    var helpers = {
+      helpa: function(options) {
+        return options.hash.length;
+      }
+    };
+
+    shouldCompileTo('{{helpa length="foo"}}', [obj, helpers], 'foo');
+  });
 });