diff --git a/libtar/libtar.h b/libtar/libtar.h
index 7a8f332..f2f423b 100644
--- a/libtar/libtar.h
+++ b/libtar/libtar.h
@@ -218,11 +218,11 @@
 /***** extract.c ***********************************************************/
 
 /* sequentially extract next file from t */
-int tar_extract_file(TAR *t, char *realname);
+int tar_extract_file(TAR *t, char *realname, char *prefix);
 
 /* extract different file types */
 int tar_extract_dir(TAR *t, char *realname);
-int tar_extract_hardlink(TAR *t, char *realname);
+int tar_extract_hardlink(TAR *t, char *realname, char *prefix);
 int tar_extract_symlink(TAR *t, char *realname);
 int tar_extract_chardev(TAR *t, char *realname);
 int tar_extract_blockdev(TAR *t, char *realname);