diff --git a/src/lowntfs-3g.c b/src/lowntfs-3g.c
index 9330500c..5b16465f 100644
--- a/src/lowntfs-3g.c
+++ b/src/lowntfs-3g.c
@@ -267,7 +267,7 @@ static const char *usage_msg =
 "\n"
 "Usage:    %s [-o option[,...]] <device|image_file> <mount_point>\n"
 "\n"
-"Options:  ro (read-only mount), windows_names, uid=, gid=,\n" 
+"Options:  ro (read-only mount), dev_offset=, windows_names, uid=, gid=,\n"
 "          umask=, fmask=, dmask=, streams_interface=.\n"
 "          Please see the details in the manual (type: man ntfs-3g).\n"
 "\n"
@@ -4307,11 +4307,11 @@ static int ntfs_fuse_init(void)
 	return 0;
 }
 
-static int ntfs_open(const char *device)
+static int ntfs_open(const char *device, const s64 dev_offset)
 {
 	unsigned long flags = 0;
 	ntfs_volume *vol;
-        
+
 	if (!ctx->blkdev)
 		flags |= NTFS_MNT_EXCLUSIVE;
 	if (ctx->ro)
@@ -4324,7 +4324,7 @@ static int ntfs_open(const char *device)
 	if (ctx->hiberfile)
 		flags |= NTFS_MNT_IGNORE_HIBERFILE;
 
-	ctx->vol = vol = ntfs_mount(device, flags);
+	ctx->vol = vol = ntfs_mount_ext(device, flags, dev_offset);
 	if (!vol) {
 		ntfs_log_perror("Failed to mount '%s'", device);
 		goto err_out;
@@ -4724,7 +4724,7 @@ int main(int argc, char *argv[])
 		goto err2;
 	}
 #endif
-	err = ntfs_open(opts.device);
+	err = ntfs_open(opts.device, ctx->dev_offset);
 	if (err)
 		goto err_out;