diff --git a/libcutils/sched_policy.c b/libcutils/sched_policy.c
index 05a2048..6d90589 100644
--- a/libcutils/sched_policy.c
+++ b/libcutils/sched_policy.c
@@ -404,7 +404,7 @@
         }
 
 
-        if (add_tid_to_cgroup(tid, fd) != 0) {
+        if (fd > 0 && add_tid_to_cgroup(tid, fd) != 0) {
             if (errno != ESRCH && errno != ENOENT)
                 return -errno;
         }