diff --git a/reactos/drivers/filesystems/fs_rec/fs_rec.h b/reactos/drivers/filesystems/fs_rec/fs_rec.h
index 490058d56bb..72b61f10fa1 100644
--- a/reactos/drivers/filesystems/fs_rec/fs_rec.h
+++ b/reactos/drivers/filesystems/fs_rec/fs_rec.h
@@ -23,7 +23,7 @@
 //
 // UDFS Offsets
 //
-#define UDFS_VRS_START_SECTOR   16
+#define UDFS_VRS_START_OFFSET  32768
 #define UDFS_AVDP_SECTOR       256
 
 //
diff --git a/reactos/drivers/filesystems/fs_rec/udfs.c b/reactos/drivers/filesystems/fs_rec/udfs.c
index d9f611e5980..8eee25a1891 100644
--- a/reactos/drivers/filesystems/fs_rec/udfs.c
+++ b/reactos/drivers/filesystems/fs_rec/udfs.c
@@ -24,12 +24,12 @@ FsRecIsUdfsVolume(IN PDEVICE_OBJECT DeviceObject,
     LARGE_INTEGER Offset;
     ULONG State = 0;
 
-    Offset.QuadPart = UDFS_VRS_START_SECTOR;
+    Offset.QuadPart = UDFS_VRS_START_OFFSET;
     while (TRUE)
     {
         if (!FsRecReadBlock(DeviceObject,
                             &Offset,
-                            512,
+                            SectorSize,
                             SectorSize,
                             (PVOID)&Buffer,
                             NULL))
@@ -41,8 +41,7 @@ FsRecIsUdfsVolume(IN PDEVICE_OBJECT DeviceObject,
         {
             case 0:
 
-                if ((Offset.QuadPart == UDFS_VRS_START_SECTOR) &&
-                    (Buffer[1] == 'B') &&
+                if ((Buffer[1] == 'B') &&
                     (Buffer[2] == 'E') &&
                     (Buffer[3] == 'A') &&
                     (Buffer[4] == '0') &&
@@ -83,7 +82,7 @@ FsRecIsUdfsVolume(IN PDEVICE_OBJECT DeviceObject,
                 break;
         }
 
-        Offset.QuadPart++;
+        Offset.QuadPart += SectorSize;
         if (Offset.QuadPart == UDFS_AVDP_SECTOR)
         {
             ExFreePool(Buffer);