diff --git a/docs/getting_started/porting-guide.rst b/docs/getting_started/porting-guide.rst
index 87c4ccb..bfe0031 100644
--- a/docs/getting_started/porting-guide.rst
+++ b/docs/getting_started/porting-guide.rst
@@ -2081,6 +2081,19 @@
 failure). A pointer to the shared area (or a NULL pointer on failure) is stored
 in the pointer passed as argument.
 
+Function : plat_rmmd_load_manifest() [when ENABLE_RME == 1]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Arguments : rmm_manifest_t *manifest
+    Return    : int
+
+When ENABLE_RME is enabled, this function populates a boot manifest for the
+RMM image and stores it in the area specified by manifest.
+
+When ENABLE_RME is disabled, this function is not used.
+
 Function : bl31_plat_enable_mmu [optional]
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~