diff --git a/core/java/android/view/KeyEvent.java b/core/java/android/view/KeyEvent.java
index 243a0fc17e52d..69287b18b81e6 100644
--- a/core/java/android/view/KeyEvent.java
+++ b/core/java/android/view/KeyEvent.java
@@ -748,8 +748,21 @@ public class KeyEvent extends InputEvent implements Parcelable {
     public static final int KEYCODE_TV_TIMER_PROGRAMMING = 258;
     /** Key code constant: Help key. */
     public static final int KEYCODE_HELP = 259;
+    /** Key code constant: Primary stem key for Wear
+     * Main power/reset button on watch.
+     * @hide */
+    public static final int KEYCODE_STEM_PRIMARY = 264;
+    /** Key code constant: Generic stem key 1 for Wear
+     * @hide */
+    public static final int KEYCODE_STEM_1 = 265;
+    /** Key code constant: Generic stem key 2 for Wear
+     * @hide */
+    public static final int KEYCODE_STEM_2 = 266;
+    /** Key code constant: Generic stem key 3 for Wear
+     * @hide */
+    public static final int KEYCODE_STEM_3 = 267;
 
-    private static final int LAST_KEYCODE = KEYCODE_HELP;
+    private static final int LAST_KEYCODE = KEYCODE_STEM_3;
 
     // NOTE: If you add a new keycode here you must also add it to:
     //  isSystem()
diff --git a/core/res/res/values/attrs.xml b/core/res/res/values/attrs.xml
index 8492eaa0dd539..ee6eef2d091a6 100644
--- a/core/res/res/values/attrs.xml
+++ b/core/res/res/values/attrs.xml
@@ -1778,6 +1778,10 @@
         <enum name="KEYCODE_TV_MEDIA_CONTEXT_MENU" value="257" />
         <enum name="KEYCODE_TV_TIMER_PROGRAMMING" value="258" />
         <enum name="KEYCODE_HELP" value="259" />
+        <enum name="KEYCODE_STEM_PRIMARY" value="264" />
+        <enum name="KEYCODE_STEM_1" value="265" />
+        <enum name="KEYCODE_STEM_2" value="266" />
+        <enum name="KEYCODE_STEM_3" value="267" />
     </attr>
 
     <!-- ***************************************************************** -->