diff --git a/src/ng/directive/input.js b/src/ng/directive/input.js
index aaabd1033398..725e8bdfa2e1 100644
--- a/src/ng/directive/input.js
+++ b/src/ng/directive/input.js
@@ -643,7 +643,7 @@ function checkboxInputType(scope, element, attr, ctrl) {
   };
 
   ctrl.$formatters.push(function(value) {
-    return value === trueValue;
+    return value == trueValue;
   });
 
   ctrl.$parsers.push(function(value) {