diff --git a/xap/qjackctl/qjackctl-0.3.12.tar.gz.sha1 b/xap/qjackctl/qjackctl-0.3.12.tar.gz.sha1
deleted file mode 100644
index 90028a58..00000000
--- a/xap/qjackctl/qjackctl-0.3.12.tar.gz.sha1
+++ /dev/null
@@ -1 +0,0 @@
-9aea6dacc5f46cb686f38f6812bf4af189b45fff  qjackctl-0.3.12.tar.gz
diff --git a/xap/qjackctl/qjackctl-0.4.2.tar.gz.sha1 b/xap/qjackctl/qjackctl-0.4.2.tar.gz.sha1
new file mode 100644
index 00000000..0eee8a49
--- /dev/null
+++ b/xap/qjackctl/qjackctl-0.4.2.tar.gz.sha1
@@ -0,0 +1 @@
+6496615d305af476387656f8af869e8a76222db9  qjackctl-0.4.2.tar.gz
diff --git a/xap/qjackctl/qjackctl.SlackBuild b/xap/qjackctl/qjackctl.SlackBuild
index 9f93da12..ef0b396c 100755
--- a/xap/qjackctl/qjackctl.SlackBuild
+++ b/xap/qjackctl/qjackctl.SlackBuild
@@ -1,6 +1,6 @@
 #!/bin/bash
 # Build script for Slackware
-# Copyright (C) 2008,2009,2010,2011,2012,2013,2014 Damien Goutte-Gattat
+# Copyright (C) 2008-2014,2016 Damien Goutte-Gattat
 #
 # Redistribution and use of this script, with or without modifications,
 # is permitted provided that the following conditions are met:
@@ -29,7 +29,7 @@
 
 # Source package infos
 NAMESRC=${NAMESRC:-qjackctl}
-VERSION=${VERSION:-0.3.12}
+VERSION=${VERSION:-0.4.2}
 ARCHIVE=${ARCHIVE:-$NAMESRC-$VERSION.tar.gz}
 WGET=${WGET:-http://downloads.sourceforge.net/qjackctl/$ARCHIVE}
 
@@ -87,7 +87,8 @@ CFLAGS=$CPUOPT \
 CXXFLAGS=$CPUOPT \
 ./configure \
   --prefix=/usr \
-  --mandir=/usr/man
+  --mandir=/usr/man \
+  --enable-qt4
 make
 make install DESTDIR=$PKG