diff --git a/pkgs/busybox b/pkgs/busybox
index b953c6e..88357a7 100644
--- a/pkgs/busybox
+++ b/pkgs/busybox
@@ -23,6 +23,7 @@ install() {
 	ln -sf busybox du
 	ln -sf busybox dd
 	ln -sf busybox ed
+	ln -sf busybox expr
 	ln -sf busybox find
 	ln -sf busybox fsck
 	ln -sf busybox fuser