diff --git a/pkg/debian/control b/pkg/debian/control
index 77df38ab..655a5065 100644
--- a/pkg/debian/control
+++ b/pkg/debian/control
@@ -2,7 +2,7 @@ Source: sems
 Section: net
 Priority: optional
 Maintainer: Stefan Sayer <sayer@iptel.org>
-Build-Depends: debhelper (>= 4), libspeex-dev, flite-dev, libxmlrpc++-dev, libspandsp-dev, libssl-dev, python-dev
+Build-Depends: debhelper (>= 4), libspeex-dev, flite-dev, libxmlrpc++-dev, libspandsp-dev, libssl-dev, python-dev, python-sip4-dev
 Standards-Version: 3.5.2
 
 Package: sems