diff --git a/docs/design_documents/index.rst b/docs/design_documents/index.rst
index 3d82e69..d20fc58 100644
--- a/docs/design_documents/index.rst
+++ b/docs/design_documents/index.rst
@@ -10,6 +10,7 @@
    measured_boot_poc
    drtm_poc
    rss
+   psci_osi_mode
 
 --------------