diff --git a/services/core/java/com/android/server/wm/WindowManagerService.java b/services/core/java/com/android/server/wm/WindowManagerService.java
index 0585679..045bc4e 100644
--- a/services/core/java/com/android/server/wm/WindowManagerService.java
+++ b/services/core/java/com/android/server/wm/WindowManagerService.java
@@ -6925,9 +6925,6 @@
         if (!checkCallingPermission(READ_FRAME_BUFFER, "requestScrollCapture()")) {
             throw new SecurityException("Requires READ_FRAME_BUFFER permission");
         }
-        if (behindClient != null && !isWindowToken(behindClient)) {
-            throw new IllegalArgumentException("behindClient must be a window token");
-        }
         final long token = Binder.clearCallingIdentity();
         try {
             synchronized (mGlobalLock) {