diff --git a/docs/components/fconf/fconf_properties.rst b/docs/components/fconf/fconf_properties.rst
index 5c28a7ae5..20cc75892 100644
--- a/docs/components/fconf/fconf_properties.rst
+++ b/docs/components/fconf/fconf_properties.rst
@@ -30,3 +30,10 @@ contains, and must be formed with the following fields:
     - value type: <u32>
     - Image ID of the configuration.
 
+- ns-load-address [optional]
+    - value type: <u64>
+    - Physical loading base address of the configuration in the non-secure
+      memory.
+      Only needed by those configuration files which require being loaded
+      in secure memory (at load-address) as well as in non-secure memory
+      e.g. HW_CONFIG