diff --git a/Libraries/Animated/src/AnimatedEvent.js b/Libraries/Animated/src/AnimatedEvent.js
index 40a3bd1ae282a9..094a20c1a1f4ef 100644
--- a/Libraries/Animated/src/AnimatedEvent.js
+++ b/Libraries/Animated/src/AnimatedEvent.js
@@ -20,7 +20,7 @@ const {shouldUseNativeDriver} = require('./NativeAnimatedHelper');
 export type Mapping = {[key: string]: Mapping} | AnimatedValue;
 export type EventConfig = {
   listener?: ?Function,
-  useNativeDriver?: boolean,
+  useNativeDriver: boolean,
 };
 
 function attachNativeEvent(
@@ -87,8 +87,14 @@ class AnimatedEvent {
   };
   __isNative: boolean;
 
-  constructor(argMapping: Array<?Mapping>, config?: EventConfig = {}) {
+  constructor(argMapping: Array<?Mapping>, config: EventConfig) {
     this._argMapping = argMapping;
+
+    if (config == null) {
+      console.warn('Animated.event now requires a second argument for options');
+      config = {};
+    }
+
     if (config.listener) {
       this.__addListener(config.listener);
     }
diff --git a/Libraries/Animated/src/AnimatedImplementation.js b/Libraries/Animated/src/AnimatedImplementation.js
index 5ab98a5ce89ad6..b31ddec0f170f7 100644
--- a/Libraries/Animated/src/AnimatedImplementation.js
+++ b/Libraries/Animated/src/AnimatedImplementation.js
@@ -508,7 +508,7 @@ function unforkEvent(
   }
 }
 
-const event = function(argMapping: Array<?Mapping>, config?: EventConfig): any {
+const event = function(argMapping: Array<?Mapping>, config: EventConfig): any {
   const animatedEvent = new AnimatedEvent(argMapping, config);
   if (animatedEvent.__isNative) {
     return animatedEvent;
diff --git a/Libraries/Animated/src/AnimatedMock.js b/Libraries/Animated/src/AnimatedMock.js
index aed90a5ad05c19..83b0e72335c67a 100644
--- a/Libraries/Animated/src/AnimatedMock.js
+++ b/Libraries/Animated/src/AnimatedMock.js
@@ -119,7 +119,7 @@ const loop = function(
   return emptyAnimation;
 };
 
-const event = function(argMapping: Array<?Mapping>, config?: EventConfig): any {
+const event = function(argMapping: Array<?Mapping>, config: EventConfig): any {
   return null;
 };
 
diff --git a/Libraries/Animated/src/NativeAnimatedHelper.js b/Libraries/Animated/src/NativeAnimatedHelper.js
index 238a8fd2ba9d71..f37829abd8e3a3 100644
--- a/Libraries/Animated/src/NativeAnimatedHelper.js
+++ b/Libraries/Animated/src/NativeAnimatedHelper.js
@@ -265,6 +265,13 @@ function assertNativeAnimatedModule(): void {
 let _warnedMissingNativeAnimated = false;
 
 function shouldUseNativeDriver(config: AnimationConfig | EventConfig): boolean {
+  if (config.useNativeDriver == null) {
+    console.warn(
+      'Animated: `useNativeDriver` was not specified. This is a required ' +
+        'option and must be explicitly set to `true` or `false`',
+    );
+  }
+
   if (config.useNativeDriver === true && !NativeAnimatedModule) {
     if (!_warnedMissingNativeAnimated) {
       console.warn(
diff --git a/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExApp.js b/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExApp.js
index 17155ec2b41cd4..993dc4129f1f05 100644
--- a/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExApp.js
+++ b/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExApp.js
@@ -65,10 +65,13 @@ class Circle extends React.Component<any, any> {
     this.setState(
       {
         panResponder: PanResponder.create({
-          onPanResponderMove: Animated.event([
-            null, // native event - ignore      (step1: uncomment)
-            {dx: this.state.pan.x, dy: this.state.pan.y}, // links pan to gestureState  (step1: uncomment)
-          ]),
+          onPanResponderMove: Animated.event(
+            [
+              null, // native event - ignore      (step1: uncomment)
+              {dx: this.state.pan.x, dy: this.state.pan.y}, // links pan to gestureState  (step1: uncomment)
+            ],
+            {useNativeDriver: false},
+          ),
           onPanResponderRelease: (e, gestureState) => {
             LayoutAnimation.easeInEaseOut(); // @flowfixme animates layout update as one batch (step3: uncomment)
             Animated.spring(this.state.pop, {
diff --git a/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExBobble.js b/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExBobble.js
index a2c95aadd08e1c..f845a4739bcce5 100644
--- a/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExBobble.js
+++ b/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExBobble.js
@@ -86,7 +86,7 @@ class AnExBobble extends React.Component<Object, any> {
       },
       onPanResponderMove: Animated.event(
         [null, {dx: this.state.bobbles[0].x, dy: this.state.bobbles[0].y}],
-        {listener: bobblePanListener}, // async state changes with arbitrary logic
+        {listener: bobblePanListener, useNativeDriver: false}, // async state changes with arbitrary logic
       ),
       onPanResponderRelease: releaseBobble,
       onPanResponderTerminate: releaseBobble,
diff --git a/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExChained.js b/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExChained.js
index fb720bfe539673..4175fdf3684384 100644
--- a/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExChained.js
+++ b/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExChained.js
@@ -63,6 +63,7 @@ class AnExChained extends React.Component<Object, any> {
       },
       onPanResponderMove: Animated.event(
         [null, {dx: this.state.stickers[0].x, dy: this.state.stickers[0].y}], // map gesture to leader
+        {useNativeDriver: false},
       ),
       onPanResponderRelease: releaseChain,
       onPanResponderTerminate: releaseChain,
diff --git a/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExScroll.js b/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExScroll.js
index 87afc77f24b2ad..35c98ee89b8b78 100644
--- a/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExScroll.js
+++ b/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExScroll.js
@@ -33,6 +33,7 @@ class AnExScroll extends React.Component<$FlowFixMeProps, any> {
           scrollEventThrottle={16 /* get all events */}
           onScroll={Animated.event(
             [{nativeEvent: {contentOffset: {x: this.state.scrollX}}}], // nested event mapping
+            {useNativeDriver: false},
           )}
           contentContainerStyle={{flex: 1, padding: 10}}
           pagingEnabled={true}
diff --git a/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExSet.js b/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExSet.js
index 439383f560370e..796f2c11f5374b 100644
--- a/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExSet.js
+++ b/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExSet.js
@@ -88,6 +88,7 @@ class AnExSet extends React.Component<Object, any> {
       },
       onPanResponderMove: Animated.event(
         [null, {dy: this.state.dismissY}], // track pan gesture
+        {useNativeDriver: false},
       ),
       onPanResponderRelease: (e, gestureState) => {
         if (gestureState.dy > 100) {
diff --git a/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExTilt.js b/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExTilt.js
index 61ad3591883f9a..ba8ca33efb9a71 100644
--- a/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExTilt.js
+++ b/RNTester/js/examples/Animated/AnimatedGratuitousApp/AnExTilt.js
@@ -38,6 +38,7 @@ class AnExTilt extends React.Component<Object, any> {
       },
       onPanResponderMove: Animated.event(
         [null, {dx: this.state.panX}], // panX is linked to the gesture
+        {useNativeDriver: false},
       ),
       onPanResponderRelease: (e, gestureState) => {
         let toValue = 0;