diff --git a/src/components/slider/demo1/index.html b/src/components/slider/demo1/index.html
index df110724966..a8b9c1b62e3 100644
--- a/src/components/slider/demo1/index.html
+++ b/src/components/slider/demo1/index.html
@@ -9,7 +9,7 @@ <h3>
     <div flex="10" layout layout-align="center center">
       <span>R</span>
     </div>
-    <material-slider ng-disabled="color.green < 125" flex min="0" max="255" ng-model="color.red" aria-label="red" id="red-slider">
+    <material-slider flex min="0" max="255" ng-model="color.red" aria-label="red" id="red-slider">
     </material-slider>
     <div flex="20" layout layout-align="center center">
       <input type="number" ng-model="color.red" aria-label="red" aria-controls="red-slider">
diff --git a/src/components/slider/slider.js b/src/components/slider/slider.js
index 4f6e2e6d3f3..bc1b24a8e8d 100644
--- a/src/components/slider/slider.js
+++ b/src/components/slider/slider.js
@@ -114,7 +114,7 @@ function SliderController(scope, element, attr, $$rAF, $timeout, $window, $mater
     attr.step ? attr.$observe('step', updateStep) : updateStep(1);
 
     attr.ngDisabled ?
-      scope.$watch(attr.ngDisabled, updateAriaDisabled) :
+      scope.$parent.$watch(attr.ngDisabled, updateAriaDisabled) :
       updateAriaDisabled(!!attr.disabled);
 
     $aria.expect(element, 'aria-label');
@@ -168,6 +168,7 @@ function SliderController(scope, element, attr, $$rAF, $timeout, $window, $mater
       redrawTicks();
     }
     function updateAriaDisabled(isDisabled) {
+      console.log('updateAriaDislabed', isDisabled);
       element.attr('aria-disabled', !!isDisabled);
     }