diff --git a/MdeModulePkg/Universal/Variable/Pei/Variable.c b/MdeModulePkg/Universal/Variable/Pei/Variable.c
index d75a13e2b0..96a52f23d1 100644
--- a/MdeModulePkg/Universal/Variable/Pei/Variable.c
+++ b/MdeModulePkg/Universal/Variable/Pei/Variable.c
@@ -498,6 +498,9 @@ CompareWithValidVariable (
 /**
   Get HOB variable store.
 
+  @param[out] StoreInfo             Return the store info.
+  @param[out] VariableStoreHeader   Return variable store header.
+
 **/
 VOID
 GetHobVariableStore (
diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
index 42b0bfda57..1ea2f84dda 100644
--- a/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
+++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/Variable.c
@@ -4173,7 +4173,7 @@ ConvertNormalVarStorageToAuthVarStorage (
 /**
   Get HOB variable store.
 
-  @param[out] VariableGuid      NV variable store signature.
+  @param[in] VariableGuid       NV variable store signature.
 
   @retval EFI_SUCCESS           Function successfully executed.
   @retval EFI_OUT_OF_RESOURCES  Fail to allocate enough memory resource.