diff --git a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.c b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.c
index ae8f117905..de38ea028a 100644
--- a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.c
+++ b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.c
@@ -47,7 +47,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 
 #include <Library/UefiBootServicesTableLib.h>
 #include "FaultTolerantWrite.h"
-EFI_EVENT                                 mFvbRegistration = NULL;
+VOID                                      *mFvbRegistration = NULL;
 
 
 /**
diff --git a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.c b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.c
index e8e935a85b..9612b39486 100644
--- a/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.c
+++ b/MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteSmm.c
@@ -56,7 +56,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 #include "FaultTolerantWriteSmmCommon.h"
 #include <Protocol/MmEndOfDxe.h>
 
-EFI_EVENT                                 mFvbRegistration = NULL;
+VOID                                      *mFvbRegistration = NULL;
 EFI_FTW_DEVICE                            *mFtwDevice      = NULL;
 
 ///
diff --git a/MdeModulePkg/Universal/LoadFileOnFv2/LoadFileOnFv2.c b/MdeModulePkg/Universal/LoadFileOnFv2/LoadFileOnFv2.c
index 4af2da05e1..43fa6ce128 100644
--- a/MdeModulePkg/Universal/LoadFileOnFv2/LoadFileOnFv2.c
+++ b/MdeModulePkg/Universal/LoadFileOnFv2/LoadFileOnFv2.c
@@ -36,7 +36,7 @@ typedef struct {
 #define LOAD_FILE_ON_FV2_PRIVATE_DATA_FROM_THIS(a) CR (a, LOAD_FILE_ON_FV2_PRIVATE_DATA, LoadFile, LOAD_FILE_ON_FV2_PRIVATE_DATA_SIGNATURE)
 #define LOAD_FILE_ON_FV2_PRIVATE_DATA_FROM_LINK(a) CR (a, LOAD_FILE_ON_FV2_PRIVATE_DATA, Link, LOAD_FILE_ON_FV2_PRIVATE_DATA_SIGNATURE)
 
-EFI_EVENT  mFvRegistration;
+VOID       *mFvRegistration;
 LIST_ENTRY mPrivateDataList;
 
 /**
diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c
index 3d232bb36c..7d2b6c8e1f 100644
--- a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c
+++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c
@@ -13,7 +13,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
 
 EFI_HANDLE                          mHandle                    = NULL;
 EFI_EVENT                           mVirtualAddressChangeEvent = NULL;
-EFI_EVENT                           mFtwRegistration           = NULL;
+VOID                                *mFtwRegistration          = NULL;
 VOID                                ***mVarCheckAddressPointer = NULL;
 UINTN                               mVarCheckAddressPointerCount = 0;
 EDKII_VARIABLE_LOCK_PROTOCOL        mVariableLock              = { VariableLockRequestToLock };