diff --git a/EdkCompatibilityPkg/Compatibility/FvHobToFvInfoThunk/FvHobToFvInfoThunk.inf b/EdkCompatibilityPkg/Compatibility/FvHobToFvInfoThunk/FvHobToFvInfoThunk.inf
index 2ab47abd29..b8bfbf9d5e 100644
--- a/EdkCompatibilityPkg/Compatibility/FvHobToFvInfoThunk/FvHobToFvInfoThunk.inf
+++ b/EdkCompatibilityPkg/Compatibility/FvHobToFvInfoThunk/FvHobToFvInfoThunk.inf
@@ -59,4 +59,6 @@
   gEfiPeiFirmwareVolumeInfoPpiGuid
 
 [Depex]
+  # This DPX ensure that this module is dispatched as late as possible in PEI phase
+  # so that all FV HOB has been built.
   gEfiPeiMemoryDiscoveredPpiGuid