diff --git a/core/java/android/os/RegistrantList.java b/core/java/android/os/RegistrantList.java
index 98f949bbfd843..81750021fdd52 100644
--- a/core/java/android/os/RegistrantList.java
+++ b/core/java/android/os/RegistrantList.java
@@ -66,6 +66,10 @@ public class RegistrantList
         }
     }
 
+    public synchronized void removeAll() {
+        registrants.clear();
+    }
+
     @UnsupportedAppUsage
     public synchronized int
     size()