diff --git a/packages/SystemUI/src/com/android/systemui/dock/DockManager.java b/packages/SystemUI/src/com/android/systemui/dock/DockManager.java
index c7637fb428891..b6f7cd04c75fd 100644
--- a/packages/SystemUI/src/com/android/systemui/dock/DockManager.java
+++ b/packages/SystemUI/src/com/android/systemui/dock/DockManager.java
@@ -34,6 +34,12 @@ public interface DockManager {
      */
     int STATE_DOCKED_HIDE = 2;
 
+    /**
+     * Indicates there's no alignment info. This could happen when the device is unable to decide
+     * its alignment condition.
+     */
+    int ALIGN_STATE_UNKNOWN = -1;
+
     /**
      * Indicates there's no alignment issue.
      */