diff --git a/internal.h b/internal.h
index 35f990a..81271be 100644
--- a/internal.h
+++ b/internal.h
@@ -102,6 +102,7 @@
 extern int scan_partitions_main(int argc, char** argv);
 extern int sh_main(int argc, char** argv);
 extern int sfdisk_main(int argc, char** argv);
+extern int sed_main(int argc, char** argv);
 extern int sleep_main(int argc, char** argv);
 extern int swap_on_off_main(int argc, char** argv);
 extern int sync_main(int argc, char** argv);