--- a/packaging/debian/debiankio/control
+++ b/packaging/debian/debiankio/control
@@ -2,7 +2,7 @@
 Section: kde
 Priority: extra
 Maintainer: Jean-Francois Dockes <jfd@recoll.org>
-Build-Depends: cdbs, cmake, debhelper (>= 7), kdelibs5-dev (>= 4:4.2.2), pkg-kde-tools (>= 0.4.0), libxapian-dev
+Build-Depends: cdbs, cmake, debhelper (>= 7), kdelibs5-dev (>= 4:4.2.2), pkg-kde-tools (>= 0.4.0), libxapian-dev, libz-dev
 Standards-Version: 3.8.1
 Homepage: http://www.recoll.org/