diff --git a/OptionRomPkg/AtapiPassThruDxe/AtapiPassThru.h b/OptionRomPkg/AtapiPassThruDxe/AtapiPassThru.h
index 8e0125684e..5ec8a3fe17 100644
--- a/OptionRomPkg/AtapiPassThruDxe/AtapiPassThru.h
+++ b/OptionRomPkg/AtapiPassThruDxe/AtapiPassThru.h
@@ -32,7 +32,7 @@
 #include <Library/MemoryAllocationLib.h>
 #include <Library/UefiBootServicesTableLib.h>
 #include <Library/PcdLib.h>
-#include <IndustryStandard/pci22.h>
+#include <IndustryStandard/Pci22.h>
 
 ///
 /// bit definition
diff --git a/OptionRomPkg/CirrusLogic5430Dxe/CirrusLogic5430.h b/OptionRomPkg/CirrusLogic5430Dxe/CirrusLogic5430.h
index a9023448a6..02d73585ec 100644
--- a/OptionRomPkg/CirrusLogic5430Dxe/CirrusLogic5430.h
+++ b/OptionRomPkg/CirrusLogic5430Dxe/CirrusLogic5430.h
@@ -40,7 +40,7 @@
 #include <Library/DevicePathLib.h>
 #include <Library/DxeI2cLib.h>
 
-#include <IndustryStandard/pci22.h>
+#include <IndustryStandard/Pci22.h>
 //
 // Cirrus Logic 5430 PCI Configuration Header values
 //