diff --git a/MdeModulePkg/Library/FileExplorerLib/FileExplorer.h b/MdeModulePkg/Library/FileExplorerLib/FileExplorer.h
index bf1450dbd5..603185abe4 100644
--- a/MdeModulePkg/Library/FileExplorerLib/FileExplorer.h
+++ b/MdeModulePkg/Library/FileExplorerLib/FileExplorer.h
@@ -51,6 +51,8 @@ typedef struct {
   EFI_DEVICE_PATH_PROTOCOL       End;
 } HII_VENDOR_DEVICE_PATH;
 
+#pragma pack()
+
 typedef struct {
   EFI_HANDLE                        DeviceHandle;
   EFI_DEVICE_PATH_PROTOCOL          *DevicePath;
@@ -100,8 +102,6 @@ typedef struct {
 
 #define FILE_EXPLORER_PRIVATE_FROM_THIS(a)  CR (a, FILE_EXPLORER_CALLBACK_DATA, FeConfigAccess, FILE_EXPLORER_CALLBACK_DATA_SIGNATURE)
 
-#pragma pack()
-
 extern UINT8    FileExplorerVfrBin[];
 
 #define MENU_OPTION_SIGNATURE      SIGNATURE_32 ('m', 'e', 'n', 'u')