diff --git a/README.rst b/README.rst
index 8d11ae7..5b37ddf 100644
--- a/README.rst
+++ b/README.rst
@@ -183,7 +183,7 @@ ionice
 rlimit
 num_handlres
 threads
-cpu_percent
+cpu_percent         x            x
 cpu_affinity
 memory_percent
 parent              x            x