diff --git a/reactos/ntoskrnl/cc/copy.c b/reactos/ntoskrnl/cc/copy.c
index 7cd5d3d014e..d63c36e06ea 100644
--- a/reactos/ntoskrnl/cc/copy.c
+++ b/reactos/ntoskrnl/cc/copy.c
@@ -66,7 +66,6 @@ ReadVacbChain (
     PROS_VACB current;
     PROS_VACB previous;
     IO_STATUS_BLOCK Iosb;
-    LARGE_INTEGER VacbOffset;
     NTSTATUS Status;
     ULONG TempLength;
     KEVENT Event;
@@ -141,11 +140,10 @@ ReadVacbChain (
             /*
              * Read in the information.
              */
-            VacbOffset.QuadPart = current->FileOffset;
             KeInitializeEvent(&Event, NotificationEvent, FALSE);
             Status = IoPageRead(SharedCacheMap->FileObject,
                                 Mdl,
-                                &VacbOffset,
+                                &current->FileOffset,
                                 &Event,
                                 &Iosb);
             if (Status == STATUS_PENDING)
@@ -194,12 +192,10 @@ CcReadVirtualAddress (
     ULONG Size;
     PMDL Mdl;
     NTSTATUS Status;
-    LARGE_INTEGER VacbOffset;
     IO_STATUS_BLOCK IoStatus;
     KEVENT Event;
 
-    VacbOffset.QuadPart = Vacb->FileOffset;
-    Size = (ULONG)(Vacb->SharedCacheMap->SectionSize.QuadPart - Vacb->FileOffset);
+    Size = (ULONG)(Vacb->SharedCacheMap->SectionSize.QuadPart - Vacb->FileOffset.QuadPart);
     if (Size > VACB_MAPPING_GRANULARITY)
     {
         Size = VACB_MAPPING_GRANULARITY;
@@ -214,7 +210,7 @@ CcReadVirtualAddress (
     MmBuildMdlForNonPagedPool(Mdl);
     Mdl->MdlFlags |= MDL_IO_PAGE_READ;
     KeInitializeEvent(&Event, NotificationEvent, FALSE);
-    Status = IoPageRead(Vacb->SharedCacheMap->FileObject, Mdl, &VacbOffset, &Event, &IoStatus);
+    Status = IoPageRead(Vacb->SharedCacheMap->FileObject, Mdl, &Vacb->FileOffset, &Event, &IoStatus);
     if (Status == STATUS_PENDING)
     {
         KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
@@ -247,12 +243,10 @@ CcWriteVirtualAddress (
     PMDL Mdl;
     NTSTATUS Status;
     IO_STATUS_BLOCK IoStatus;
-    LARGE_INTEGER VacbOffset;
     KEVENT Event;
 
     Vacb->Dirty = FALSE;
-    VacbOffset.QuadPart = Vacb->FileOffset;
-    Size = (ULONG)(Vacb->SharedCacheMap->SectionSize.QuadPart - Vacb->FileOffset);
+    Size = (ULONG)(Vacb->SharedCacheMap->SectionSize.QuadPart - Vacb->FileOffset.QuadPart);
     if (Size > VACB_MAPPING_GRANULARITY)
     {
         Size = VACB_MAPPING_GRANULARITY;
@@ -277,7 +271,7 @@ CcWriteVirtualAddress (
     MmBuildMdlForNonPagedPool(Mdl);
     Mdl->MdlFlags |= MDL_IO_PAGE_READ;
     KeInitializeEvent(&Event, NotificationEvent, FALSE);
-    Status = IoSynchronousPageWrite(Vacb->SharedCacheMap->FileObject, Mdl, &VacbOffset, &Event, &IoStatus);
+    Status = IoSynchronousPageWrite(Vacb->SharedCacheMap->FileObject, Mdl, &Vacb->FileOffset, &Event, &IoStatus);
     if (Status == STATUS_PENDING)
     {
         KeWaitForSingleObject(&Event, Executive, KernelMode, FALSE, NULL);
@@ -364,7 +358,8 @@ CcCopyRead (
                                         ROS_VACB,
                                         CacheMapVacbListEntry);
             if (!current->Valid &&
-                DoRangesIntersect(current->FileOffset, VACB_MAPPING_GRANULARITY,
+                DoRangesIntersect(current->FileOffset.QuadPart,
+                                  VACB_MAPPING_GRANULARITY,
                                   ReadOffset, Length))
             {
                 KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, oldirql);
@@ -372,7 +367,7 @@ CcCopyRead (
                 IoStatus->Information = 0;
                 return FALSE;
             }
-            if (current->FileOffset >= ReadOffset + Length)
+            if (current->FileOffset.QuadPart >= ReadOffset + Length)
                 break;
             current_entry = current_entry->Flink;
         }
@@ -482,14 +477,15 @@ CcCopyWrite (
                                      ROS_VACB,
                                      CacheMapVacbListEntry);
             if (!Vacb->Valid &&
-                DoRangesIntersect(Vacb->FileOffset, VACB_MAPPING_GRANULARITY,
+                DoRangesIntersect(Vacb->FileOffset.QuadPart,
+                                  VACB_MAPPING_GRANULARITY,
                                   WriteOffset, Length))
             {
                 KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, oldirql);
                 /* datas not available */
                 return FALSE;
             }
-            if (Vacb->FileOffset >= WriteOffset + Length)
+            if (Vacb->FileOffset.QuadPart >= WriteOffset + Length)
                 break;
             current_entry = current_entry->Flink;
         }
@@ -704,14 +700,15 @@ CcZeroData (
                                          ROS_VACB,
                                          CacheMapVacbListEntry);
                 if (!Vacb->Valid &&
-                    DoRangesIntersect(Vacb->FileOffset, VACB_MAPPING_GRANULARITY,
+                    DoRangesIntersect(Vacb->FileOffset.QuadPart,
+                                      VACB_MAPPING_GRANULARITY,
                                       WriteOffset.u.LowPart, Length))
                 {
                     KeReleaseSpinLock(&SharedCacheMap->CacheMapLock, oldirql);
                     /* datas not available */
                     return FALSE;
                 }
-                if (Vacb->FileOffset >= WriteOffset.u.LowPart + Length)
+                if (Vacb->FileOffset.QuadPart >= WriteOffset.u.LowPart + Length)
                     break;
                 current_entry = current_entry->Flink;
             }
diff --git a/reactos/ntoskrnl/cc/fs.c b/reactos/ntoskrnl/cc/fs.c
index 0652891f0da..2b95fb19376 100644
--- a/reactos/ntoskrnl/cc/fs.c
+++ b/reactos/ntoskrnl/cc/fs.c
@@ -163,7 +163,7 @@ CcSetFileSizes (
                                         ROS_VACB,
                                         CacheMapVacbListEntry);
             current_entry = current_entry->Flink;
-            if (current->FileOffset >= FileSizes->AllocationSize.QuadPart)
+            if (current->FileOffset.QuadPart >= FileSizes->AllocationSize.QuadPart)
             {
                 if ((current->ReferenceCount == 0) || ((current->ReferenceCount == 1) && current->Dirty))
                 {
diff --git a/reactos/ntoskrnl/cc/view.c b/reactos/ntoskrnl/cc/view.c
index 2bce41bdfdf..0584917098c 100644
--- a/reactos/ntoskrnl/cc/view.c
+++ b/reactos/ntoskrnl/cc/view.c
@@ -456,7 +456,8 @@ CcRosLookupVacb (
         current = CONTAINING_RECORD(current_entry,
                                     ROS_VACB,
                                     CacheMapVacbListEntry);
-        if (IsPointInRange(current->FileOffset, VACB_MAPPING_GRANULARITY,
+        if (IsPointInRange(current->FileOffset.QuadPart,
+                           VACB_MAPPING_GRANULARITY,
                            FileOffset))
         {
             CcRosVacbIncRefCount(current);
@@ -469,7 +470,7 @@ CcRosLookupVacb (
                                   NULL);
             return current;
         }
-        if (current->FileOffset > FileOffset)
+        if (current->FileOffset.QuadPart > FileOffset)
             break;
         current_entry = current_entry->Flink;
     }
@@ -606,7 +607,7 @@ CcRosCreateVacb (
     current->Valid = FALSE;
     current->Dirty = FALSE;
     current->PageOut = FALSE;
-    current->FileOffset = ROUND_DOWN(FileOffset, VACB_MAPPING_GRANULARITY);
+    current->FileOffset.QuadPart = ROUND_DOWN(FileOffset, VACB_MAPPING_GRANULARITY);
     current->SharedCacheMap = SharedCacheMap;
 #if DBG
     if (SharedCacheMap->Trace)
@@ -640,7 +641,8 @@ CcRosCreateVacb (
         current = CONTAINING_RECORD(current_entry,
                                     ROS_VACB,
                                     CacheMapVacbListEntry);
-        if (IsPointInRange(current->FileOffset, VACB_MAPPING_GRANULARITY,
+        if (IsPointInRange(current->FileOffset.QuadPart,
+                           VACB_MAPPING_GRANULARITY,
                            FileOffset))
         {
             CcRosVacbIncRefCount(current);
@@ -665,13 +667,13 @@ CcRosCreateVacb (
                                   NULL);
             return STATUS_SUCCESS;
         }
-        if (current->FileOffset < FileOffset)
+        if (current->FileOffset.QuadPart < FileOffset)
         {
             ASSERT(previous == NULL ||
-                   previous->FileOffset < current->FileOffset);
+                   previous->FileOffset.QuadPart < current->FileOffset.QuadPart);
             previous = current;
         }
-        if (current->FileOffset > FileOffset)
+        if (current->FileOffset.QuadPart > FileOffset)
             break;
         current_entry = current_entry->Flink;
     }
@@ -798,7 +800,7 @@ NTAPI
 CcRosGetVacb (
     PROS_SHARED_CACHE_MAP SharedCacheMap,
     ULONG FileOffset,
-    PULONG BaseOffset,
+    PULONGLONG BaseOffset,
     PVOID* BaseAddress,
     PBOOLEAN UptoDate,
     PROS_VACB *Vacb)
@@ -841,7 +843,7 @@ CcRosGetVacb (
     *BaseAddress = current->BaseAddress;
     DPRINT("*BaseAddress %p\n", *BaseAddress);
     *Vacb = current;
-    *BaseOffset = current->FileOffset;
+    *BaseOffset = current->FileOffset.QuadPart;
     return STATUS_SUCCESS;
 }
 
@@ -857,7 +859,7 @@ CcRosRequestVacb (
  * FUNCTION: Request a page mapping for a shared cache map
  */
 {
-    ULONG BaseOffset;
+    ULONGLONG BaseOffset;
 
     ASSERT(SharedCacheMap);
 
diff --git a/reactos/ntoskrnl/include/internal/cc.h b/reactos/ntoskrnl/include/internal/cc.h
index e781e14c15b..57649deec89 100644
--- a/reactos/ntoskrnl/include/internal/cc.h
+++ b/reactos/ntoskrnl/include/internal/cc.h
@@ -138,7 +138,7 @@ typedef struct _ROS_VACB
     LIST_ENTRY VacbListEntry;
     LIST_ENTRY VacbLruListEntry;
     /* Offset in the file which this view maps. */
-    ULONG FileOffset;
+    LARGE_INTEGER FileOffset;
     /* Mutex */
     KMUTEX Mutex;
     /* Number of references. */
@@ -187,7 +187,7 @@ NTAPI
 CcRosGetVacb(
     PROS_SHARED_CACHE_MAP SharedCacheMap,
     ULONG FileOffset,
-    PULONG BaseOffset,
+    PULONGLONG BaseOffset,
     PVOID *BaseAddress,
     PBOOLEAN UptoDate,
     PROS_VACB *Vacb
@@ -305,9 +305,9 @@ CcTryToInitializeFileCache(PFILE_OBJECT FileObject);
 FORCEINLINE
 BOOLEAN
 DoRangesIntersect(
-    _In_ ULONG Offset1,
+    _In_ ULONGLONG Offset1,
     _In_ ULONG Length1,
-    _In_ ULONG Offset2,
+    _In_ ULONGLONG Offset2,
     _In_ ULONG Length2)
 {
     if (Offset1 + Length1 <= Offset2)
@@ -320,9 +320,9 @@ DoRangesIntersect(
 FORCEINLINE
 BOOLEAN
 IsPointInRange(
-    _In_ ULONG Offset1,
+    _In_ ULONGLONG Offset1,
     _In_ ULONG Length1,
-    _In_ ULONG Point)
+    _In_ ULONGLONG Point)
 {
     return DoRangesIntersect(Offset1, Length1, Point, 1);
 }
diff --git a/reactos/ntoskrnl/mm/section.c b/reactos/ntoskrnl/mm/section.c
index 268e65761e5..ec3b0947678 100644
--- a/reactos/ntoskrnl/mm/section.c
+++ b/reactos/ntoskrnl/mm/section.c
@@ -1066,7 +1066,7 @@ MiReadPage(PMEMORY_AREA MemoryArea,
  *       Page - Variable that receives a page contains the read data.
  */
 {
-   ULONG BaseOffset;
+   ULONGLONG BaseOffset;
    ULONGLONG FileOffset;
    PVOID BaseAddress;
    BOOLEAN UptoDate;