diff --git a/api/system-current.txt b/api/system-current.txt
index 8bb1983..b9fc3c6 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -1198,6 +1198,7 @@
     field public static final int ACTION_DISMISS = 2; // 0x2
     field public static final int ACTION_LAUNCH = 1; // 0x1
     field public static final int ACTION_PIN = 3; // 0x3
+    field public static final int ACTION_UNPIN = 4; // 0x4
     field @NonNull public static final android.os.Parcelable.Creator<android.app.prediction.AppTargetEvent> CREATOR;
   }
 
diff --git a/api/test-current.txt b/api/test-current.txt
index 2d35736..3ddbbf8 100644
--- a/api/test-current.txt
+++ b/api/test-current.txt
@@ -578,6 +578,7 @@
     field public static final int ACTION_DISMISS = 2; // 0x2
     field public static final int ACTION_LAUNCH = 1; // 0x1
     field public static final int ACTION_PIN = 3; // 0x3
+    field public static final int ACTION_UNPIN = 4; // 0x4
     field @NonNull public static final android.os.Parcelable.Creator<android.app.prediction.AppTargetEvent> CREATOR;
   }
 
diff --git a/core/java/android/app/prediction/AppTargetEvent.java b/core/java/android/app/prediction/AppTargetEvent.java
index 26ff0c1..f519145 100644
--- a/core/java/android/app/prediction/AppTargetEvent.java
+++ b/core/java/android/app/prediction/AppTargetEvent.java
@@ -38,7 +38,7 @@
     /**
      * @hide
      */
-    @IntDef({ACTION_LAUNCH, ACTION_DISMISS, ACTION_PIN})
+    @IntDef({ACTION_LAUNCH, ACTION_DISMISS, ACTION_PIN, ACTION_UNPIN})
     @Retention(RetentionPolicy.SOURCE)
     public @interface ActionType {}
 
@@ -57,6 +57,11 @@
      */
     public static final int ACTION_PIN = 3;
 
+    /**
+     * Event type constant indicating an app target has been un-pinned.
+     */
+    public static final int ACTION_UNPIN = 4;
+
     private final AppTarget mTarget;
     private final String mLocation;
     private final int mAction;