diff --git a/MdeModulePkg/MdeModulePkg.dsc b/MdeModulePkg/MdeModulePkg.dsc
index 742975bf39..4086df002b 100644
--- a/MdeModulePkg/MdeModulePkg.dsc
+++ b/MdeModulePkg/MdeModulePkg.dsc
@@ -323,7 +323,6 @@
 [Components.IA32, Components.X64]
   MdeModulePkg/Universal/DebugSupportDxe/DebugSupportDxe.inf
   MdeModulePkg/Universal/EbcDxe/EbcDxe.inf
-  MdeModulePkg/Universal/PcatRealTimeClockRuntimeDxe/PcatRealTimeClockRuntimeDxe.inf
   MdeModulePkg/Universal/Variable/EmuRuntimeDxe/EmuVariableRuntimeDxe.inf
   MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf
 
@@ -334,9 +333,5 @@
 
 
 [Components.EBC]
-  #
-  # PcatRealTimeClockRuntimeDxe.inf needs DXE I/O Library instance.
-  #
-  #MdeModulePkg/Universal/PcatRealTimeClockRuntimeDxe/PcatRealTimeClockRuntimeDxe.inf
   MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf
   MdeModulePkg/Universal/Variable/EmuRuntimeDxe/EmuVariableRuntimeDxe.inf