diff --git a/mm/migrate.c b/mm/migrate.c
index 755277966a54..a84e20e7098a 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1424,7 +1424,7 @@ SYSCALL_DEFINE6(move_pages, pid_t, pid, unsigned long, nr_pages,
 	 * Check if this process has the right to modify the specified
 	 * process. Use the regular "ptrace_may_access()" checks.
 	 */
-	if (!ptrace_may_access(task, PTRACE_MODE_READ)) {
+	if (!ptrace_may_access(task, PTRACE_MODE_READ_REALCREDS)) {
 		rcu_read_unlock();
 		err = -EPERM;
 		goto out;