diff --git a/MdePkg/MdePkg.spd b/MdePkg/MdePkg.spd
index d0d306a904..124b6071a2 100644
--- a/MdePkg/MdePkg.spd
+++ b/MdePkg/MdePkg.spd
@@ -252,6 +252,7 @@
     <IncludePkgHeader ModuleType="DXE_SAL_DRIVER">Include/Dxe.h</IncludePkgHeader>
     <IncludePkgHeader ModuleType="UEFI_DRIVER">Include/Uefi.h</IncludePkgHeader>
     <IncludePkgHeader ModuleType="UEFI_APPLICATION">Include/Uefi.h</IncludePkgHeader>
+    <IncludePkgHeader ModuleType="USER_DEFINED">Include/Peim.h</IncludePkgHeader>
   </PackageHeaders>
   <GuidDeclarations>
     <Entry Name="Acpi10Table">