diff --git a/MdePkg/Include/IndustryStandard/Acpi20.h b/MdePkg/Include/IndustryStandard/Acpi20.h
index 0ae652f311..3b5a4e8a89 100644
--- a/MdePkg/Include/IndustryStandard/Acpi20.h
+++ b/MdePkg/Include/IndustryStandard/Acpi20.h
@@ -14,7 +14,7 @@
 #ifndef _ACPI_2_0_H_
 #define _ACPI_2_0_H_
 
-#include <IndustryStandard/Acpi1_0.h>
+#include <IndustryStandard/Acpi10.h>
 
 //
 // Ensure proper structure formats
diff --git a/MdePkg/Include/IndustryStandard/Acpi30.h b/MdePkg/Include/IndustryStandard/Acpi30.h
index 83296e23dd..5414ef5c16 100644
--- a/MdePkg/Include/IndustryStandard/Acpi30.h
+++ b/MdePkg/Include/IndustryStandard/Acpi30.h
@@ -14,7 +14,7 @@
 #ifndef _ACPI_3_0_H_
 #define _ACPI_3_0_H_
 
-#include <IndustryStandard/Acpi2_0.h>
+#include <IndustryStandard/Acpi20.h>
 
 //
 // Ensure proper structure formats
diff --git a/MdePkg/Include/IndustryStandard/IScsiBootFirmwareTable.h b/MdePkg/Include/IndustryStandard/IScsiBootFirmwareTable.h
index 934939fcd1..70cfc88322 100644
--- a/MdePkg/Include/IndustryStandard/IScsiBootFirmwareTable.h
+++ b/MdePkg/Include/IndustryStandard/IScsiBootFirmwareTable.h
@@ -17,7 +17,7 @@
 #ifndef _ISCSI_BOOT_FIRMWARE_TABLE_H_
 #define _ISCSI_BOOT_FIRMWARE_TABLE_H_
 
-#include "Acpi3_0.h"
+#include "Acpi30.h"
 
 #define EFI_ACPI_ISCSI_BOOT_FIRMWARE_TABLE_REVISION            0x01
 #define EFI_ACPI_ISCSI_BOOT_FIRMWARE_TABLE_STRUCTURE_ALIGNMENT 8