diff --git a/internal.h b/internal.h
index 7ae1297..fcb24dc 100644
--- a/internal.h
+++ b/internal.h
@@ -68,6 +68,7 @@
 extern int clear_main(int argc, char** argv);
 extern int date_main(int argc, char** argv);
 extern int dd_main(int argc, char** argv);
+extern int dirname_main(int argc, char** argv);
 extern int deallocvt_main(int argc, char** argv);
 extern int df_main(int argc, char** argv);
 extern int dmesg_main(int argc, char** argv);
@@ -134,6 +135,7 @@
 extern int tee_main(int argc, char** argv);
 extern int telnet_main(int argc, char** argv);
 extern int touch_main(int argc, char** argv);
+extern int tr_main(int argc, char** argv);
 extern int true_main(int argc, char** argv);
 extern int tput_main(int argc, char** argv);
 extern int tryopen_main(int argc, char** argv);