diff --git a/debian/control b/debian/control
index 4bbeddd239..d05d990dc6 100644
--- a/debian/control
+++ b/debian/control
@@ -51,6 +51,7 @@ Build-Depends:
 	libghc-async-dev,
 	libghc-http-dev,
 	libghc-feed-dev,
+	lsof,
 	ikiwiki,
 	perlmagick,
 	git (>= 1:1.8.4),