Wrap do_ntfs_umount() declaration with WITH_NTFS_3G

diff --git a/src/wimlib_internal.h b/src/wimlib_internal.h
index da17c9e..6528b77 100644 (file)
--- a/src/wimlib_internal.h
+++ b/src/wimlib_internal.h
@@ -562,8 +562,10 @@ build_dentry_tree_ntfs(struct wim_dentry **root_p,
                       wimlib_progress_func_t progress_func,
                       void *extra_arg);
 
+#ifdef WITH_NTFS_3G
 extern int
 do_ntfs_umount(struct _ntfs_volume *vol);
+#endif
 
 /* resource.c */