diff --git a/reactos/drivers/filesystems/ntfs/ntfs.h b/reactos/drivers/filesystems/ntfs/ntfs.h
index 504473b58c3..22187d65253 100644
--- a/reactos/drivers/filesystems/ntfs/ntfs.h
+++ b/reactos/drivers/filesystems/ntfs/ntfs.h
@@ -715,6 +715,9 @@ NtfsFsdWrite(PDEVICE_OBJECT DeviceObject,
 
 /* volinfo.c */
 
+ULONGLONG
+NtfsGetFreeClusters(PDEVICE_EXTENSION DeviceExt);
+
 NTSTATUS
 NtfsQueryVolumeInformation(PNTFS_IRP_CONTEXT IrpContext);
 
diff --git a/reactos/drivers/filesystems/ntfs/volinfo.c b/reactos/drivers/filesystems/ntfs/volinfo.c
index 7893c67759c..7b07312d66a 100644
--- a/reactos/drivers/filesystems/ntfs/volinfo.c
+++ b/reactos/drivers/filesystems/ntfs/volinfo.c
@@ -32,7 +32,6 @@
 
 /* FUNCTIONS ****************************************************************/
 
-static
 ULONGLONG
 NtfsGetFreeClusters(PDEVICE_EXTENSION DeviceExt)
 {