diff --git a/src/core/ReactNativeComponent.js b/src/core/ReactNativeComponent.js
index f888385e57..07371b2c8f 100644
--- a/src/core/ReactNativeComponent.js
+++ b/src/core/ReactNativeComponent.js
@@ -247,7 +247,8 @@ ReactNativeComponent.Mixin = {
         if (lastProp) {
           // Unset styles on `lastProp` but not on `nextProp`.
           for (styleName in lastProp) {
-            if (lastProp.hasOwnProperty(styleName) && !nextProp[styleName]) {
+            if (lastProp.hasOwnProperty(styleName) &&
+                !nextProp.hasOwnProperty(styleName)) {
               styleUpdates = styleUpdates || {};
               styleUpdates[styleName] = '';
             }
diff --git a/src/core/__tests__/ReactNativeComponent-test.js b/src/core/__tests__/ReactNativeComponent-test.js
index 66fb845610..55e5f13ec6 100644
--- a/src/core/__tests__/ReactNativeComponent-test.js
+++ b/src/core/__tests__/ReactNativeComponent-test.js
@@ -70,7 +70,7 @@ describe('ReactNativeComponent', function() {
     });
 
     it("should update styles when mutating style object", function() {
-      var styles = { display: 'none', fontFamily: 'Arial' };
+      var styles = { display: 'none', fontFamily: 'Arial', opacity: 0 };
       var stub = ReactTestUtils.renderIntoDocument(<div style={styles} />);
 
       var stubStyle = stub.getDOMNode().style;
@@ -82,12 +82,21 @@ describe('ReactNativeComponent', function() {
       stub.receiveProps({ style: styles }, transaction);
       expect(stubStyle.display).toEqual('block');
       expect(stubStyle.fontFamily).toEqual('Arial');
+      expect(stubStyle.opacity).toEqual('0');
 
       styles.fontFamily = 'Helvetica';
 
       stub.receiveProps({ style: styles }, transaction);
       expect(stubStyle.display).toEqual('block');
       expect(stubStyle.fontFamily).toEqual('Helvetica');
+      expect(stubStyle.opacity).toEqual('0');
+
+      styles.opacity = 0.5;
+
+      stub.receiveProps({ style: styles }, transaction);
+      expect(stubStyle.display).toEqual('block');
+      expect(stubStyle.fontFamily).toEqual('Helvetica');
+      expect(stubStyle.opacity).toEqual('0.5');
     });
 
     it("should update styles if initially null", function() {
diff --git a/src/dom/CSSPropertyOperations.js b/src/dom/CSSPropertyOperations.js
index a7d5673dc1..ab46485f36 100644
--- a/src/dom/CSSPropertyOperations.js
+++ b/src/dom/CSSPropertyOperations.js
@@ -74,8 +74,10 @@ var CSSPropertyOperations = {
       if (!styles.hasOwnProperty(styleName)) {
         continue;
       }
-      var styleValue = styles[styleName];
-      if (!styleValue) {
+      var styleValue = dangerousStyleValue(styleName, styles[styleName]);
+      if (styleValue) {
+        style[styleName] = styleValue;
+      } else {
         var expansion = CSSProperty.shorthandPropertyExpansions[styleName];
         if (expansion) {
           // Shorthand property that IE8 won't like unsetting, so unset each
@@ -86,8 +88,6 @@ var CSSPropertyOperations = {
         } else {
           style[styleName] = '';
         }
-      } else {
-        style[styleName] = dangerousStyleValue(styleName, styleValue);
       }
     }
   }