diff --git a/debian/indi-astarbox/control b/debian/indi-astarbox/control
index 2a610fc4f..f1d558f6e 100644
--- a/debian/indi-astarbox/control
+++ b/debian/indi-astarbox/control
@@ -2,7 +2,7 @@ Source: indi-astarbox
 Section: science
 Priority: extra
 Maintainer: Colin McGill <info@astarbox.co.uk>
-Build-Depends: debhelper (>= 5), pkg-config, cdbs, cmake, libindi-dev
+Build-Depends: debhelper (>= 5), pkg-config, cdbs, cmake, libindi-dev, zlib1g-dev
 Standards-Version: 3.9.1
 
 Package: indi-astarbox