diff --git a/api/current.txt b/api/current.txt
index bf0b0cb67a991..f82e4e97cf73f 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -55187,7 +55187,7 @@ package android.view {
   }
 
   public class ViewPropertyAnimator {
-    method public android.view.ViewPropertyAnimator alpha(float);
+    method public android.view.ViewPropertyAnimator alpha(@FloatRange(from=0.0f, to=1.0f) float);
     method public android.view.ViewPropertyAnimator alphaBy(float);
     method public void cancel();
     method public long getDuration();
diff --git a/core/java/android/view/ViewPropertyAnimator.java b/core/java/android/view/ViewPropertyAnimator.java
index 859e9a43f7c27..65cc2f8bcd5af 100644
--- a/core/java/android/view/ViewPropertyAnimator.java
+++ b/core/java/android/view/ViewPropertyAnimator.java
@@ -19,6 +19,7 @@ package android.view;
 import android.animation.Animator;
 import android.animation.TimeInterpolator;
 import android.animation.ValueAnimator;
+import android.annotation.FloatRange;
 import android.graphics.RenderNode;
 
 import java.util.ArrayList;
@@ -725,7 +726,7 @@ public class ViewPropertyAnimator {
      * @see View#setAlpha(float)
      * @return This object, allowing calls to methods in this class to be chained.
      */
-    public ViewPropertyAnimator alpha(float value) {
+    public ViewPropertyAnimator alpha(@FloatRange(from = 0.0f, to = 1.0f) float value) {
         animateProperty(ALPHA, value);
         return this;
     }
diff --git a/non-updatable-api/current.txt b/non-updatable-api/current.txt
index 2ce11f1d2c39e..a2ae96d96c0b1 100644
--- a/non-updatable-api/current.txt
+++ b/non-updatable-api/current.txt
@@ -53330,7 +53330,7 @@ package android.view {
   }
 
   public class ViewPropertyAnimator {
-    method public android.view.ViewPropertyAnimator alpha(float);
+    method public android.view.ViewPropertyAnimator alpha(@FloatRange(from=0.0f, to=1.0f) float);
     method public android.view.ViewPropertyAnimator alphaBy(float);
     method public void cancel();
     method public long getDuration();