diff --git a/services/core/java/com/android/server/clipboard/ClipboardService.java b/services/core/java/com/android/server/clipboard/ClipboardService.java
index efc930e..e6228d4 100644
--- a/services/core/java/com/android/server/clipboard/ClipboardService.java
+++ b/services/core/java/com/android/server/clipboard/ClipboardService.java
@@ -435,9 +435,14 @@
     }
 
     private boolean isDeviceLocked() {
-        final KeyguardManager keyguardManager = getContext().getSystemService(
+        final long token = Binder.clearCallingIdentity();
+        try {
+            final KeyguardManager keyguardManager = getContext().getSystemService(
                     KeyguardManager.class);
-        return keyguardManager != null && keyguardManager.isDeviceLocked();
+            return keyguardManager != null && keyguardManager.isDeviceLocked();
+        } finally {
+            Binder.restoreCallingIdentity(token);
+        }
     }
 
     private final void checkUriOwnerLocked(Uri uri, int uid) {