diff --git a/src/sys/driver.h b/src/sys/driver.h
index 9758c5bc..8b7af81f 100644
--- a/src/sys/driver.h
+++ b/src/sys/driver.h
@@ -1022,6 +1022,9 @@ BOOLEAN FspFileNodeTrySetSecurity(FSP_FILE_NODE *FileNode, PCVOID Buffer, ULONG
 static inline
 ULONG FspFileNodeSecurityChangeNumber(FSP_FILE_NODE *FileNode)
 {
+    if (0 != FileNode->MainFileNode)
+        FileNode = FileNode->MainFileNode;
+
     return FileNode->SecurityChangeNumber;
 }
 BOOLEAN FspFileNodeReferenceDirInfo(FSP_FILE_NODE *FileNode, PCVOID *PBuffer, PULONG PSize);
diff --git a/src/sys/file.c b/src/sys/file.c
index 97cb10c9..57487a58 100644
--- a/src/sys/file.c
+++ b/src/sys/file.c
@@ -945,6 +945,9 @@ BOOLEAN FspFileNodeReferenceSecurity(FSP_FILE_NODE *FileNode, PCVOID *PBuffer, P
 {
     PAGED_CODE();
 
+    if (0 != FileNode->MainFileNode)
+        FileNode = FileNode->MainFileNode;
+
     FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension =
         FspFsvolDeviceExtension(FileNode->FsvolDeviceObject);
 
@@ -956,6 +959,9 @@ VOID FspFileNodeSetSecurity(FSP_FILE_NODE *FileNode, PCVOID Buffer, ULONG Size)
 {
     PAGED_CODE();
 
+    if (0 != FileNode->MainFileNode)
+        FileNode = FileNode->MainFileNode;
+
     FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension =
         FspFsvolDeviceExtension(FileNode->FsvolDeviceObject);
 
@@ -970,6 +976,9 @@ BOOLEAN FspFileNodeTrySetSecurity(FSP_FILE_NODE *FileNode, PCVOID Buffer, ULONG
 {
     PAGED_CODE();
 
+    if (0 != FileNode->MainFileNode)
+        FileNode = FileNode->MainFileNode;
+
     if (FileNode->SecurityChangeNumber != SecurityChangeNumber)
         return FALSE;