diff --git a/docs/glossary.rst b/docs/glossary.rst
index 6f27f33..73e91aa 100644
--- a/docs/glossary.rst
+++ b/docs/glossary.rst
@@ -80,9 +80,13 @@
         A component within the TEE that is atomic from a security/trust point of
         view, i.e. which is viewed as a single entity from a TF-M point of view.
 
-    SST : TF-M related
-    Secure Storage Service
-        Secure storage service provided by TF-M.
+    PS : TF-M related
+    Protected Storage
+        Protected storage service provided by TF-M.
+
+    ITS : TF-M related
+    Internal Trusted Storage
+        Internal Trusted Storage service provided by TF-M.
 
     TFM
     TF-M