diff --git a/MdePkg/Include/IndustryStandard/IScsiBootFirmwareTable.h b/MdePkg/Include/IndustryStandard/IScsiBootFirmwareTable.h
index d47430b82f..ec31e6188c 100644
--- a/MdePkg/Include/IndustryStandard/IScsiBootFirmwareTable.h
+++ b/MdePkg/Include/IndustryStandard/IScsiBootFirmwareTable.h
@@ -28,7 +28,7 @@ enum {
   EFI_ACPI_ISCSI_BOOT_FIRMWARE_TABLE_INITIATOR_STRUCTURE_ID,
   EFI_ACPI_ISCSI_BOOT_FIRMWARE_TABLE_NIC_STRUCTURE_ID,
   EFI_ACPI_ISCSI_BOOT_FIRMWARE_TABLE_TARGET_STRUCTURE_ID,
-  EFI_ACPI_ISCSI_BOOT_FIRMWARE_TABLE_EXTERNSIONS_STRUCTURE_ID,
+  EFI_ACPI_ISCSI_BOOT_FIRMWARE_TABLE_EXTERNSIONS_STRUCTURE_ID
 };
 
 enum {
diff --git a/MdePkg/Include/IndustryStandard/Usb.h b/MdePkg/Include/IndustryStandard/Usb.h
index 0c251142a9..f64d96c87c 100644
--- a/MdePkg/Include/IndustryStandard/Usb.h
+++ b/MdePkg/Include/IndustryStandard/Usb.h
@@ -190,7 +190,7 @@ enum {
   //
   //Use 200 ms to increase the error handling response time
   //
-  EFI_USB_INTERRUPT_DELAY = 2000000,
+  EFI_USB_INTERRUPT_DELAY = 2000000
 };
 
 
diff --git a/MdePkg/Include/Ppi/Decompress.h b/MdePkg/Include/Ppi/Decompress.h
index 87b893ccd2..51ef963246 100644
--- a/MdePkg/Include/Ppi/Decompress.h
+++ b/MdePkg/Include/Ppi/Decompress.h
@@ -21,7 +21,7 @@
 #define EFI_PEI_DECOMPRESS_PPI_GUID \
   { 0x1a36e4e7, 0xfab6, 0x476a, { 0x8e, 0x75, 0x69, 0x5a, 0x5, 0x76, 0xfd, 0xd7 } }
 
-typedef struct _EFI_PEI_DECOMPRESS_PPI  EFI_PEI_DECOMPRESS_PPI;;
+typedef struct _EFI_PEI_DECOMPRESS_PPI  EFI_PEI_DECOMPRESS_PPI;
 
 /**                                                              
   Decompresses the data in a compressed section and returns it