diff --git a/contrib/scripts/install_prereq b/contrib/scripts/install_prereq
index 5cf1459810fa37cfe6591060ef18928619f50d96..485f5955584d28e884e1650966f491886f78fddb 100755
--- a/contrib/scripts/install_prereq
+++ b/contrib/scripts/install_prereq
@@ -24,7 +24,7 @@ PACKAGES_DEBIAN="$PACKAGES_DEBIAN libncurses-dev libz-dev libssl-dev libxml2-dev
 # Asterisk: for addons:
 PACKAGES_DEBIAN="$PACKAGES_DEBIAN libcurl-dev libspeex-dev libspeexdsp-dev libogg-dev libvorbis-dev libasound2-dev portaudio19-dev"
 PACKAGES_DEBIAN="$PACKAGES_DEBIAN libpq-dev unixodbc-dev libsqlite0-dev libsqlite3-dev libmysqlclient15-dev libneon27-dev libgmime-2.0-2-dev libusb-dev liblua5.1-0-dev"
-PACKAGES_DEBIAN="$PACKAGES_DEBIAN libopenh323-dev libvpb-dev libgtk2.0-dev libmysqlclient-dev libbluetooth-dev libradiusclient-ng-dev"
+PACKAGES_DEBIAN="$PACKAGES_DEBIAN libopenh323-dev libvpb-dev libgtk2.0-dev libmysqlclient-dev libbluetooth-dev libradiusclient-ng-dev freetds-dev"
 PACKAGES_DEBIAN="$PACKAGES_DEBIAN libsnmp-dev libiksemel-dev "
 
 PACKAGES_RH="gcc gcc-c++ ncurses-devel openssl-devel"