diff --git a/system/tmux/tmux.SlackBuild b/system/tmux/tmux.SlackBuild
index b27c60967c..eb2fa15832 100644
--- a/system/tmux/tmux.SlackBuild
+++ b/system/tmux/tmux.SlackBuild
@@ -23,7 +23,7 @@
 # ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 PRGNAM=tmux
-VERSION=${VERSION:-1.4}
+VERSION=${VERSION:-1.5}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
 
@@ -69,10 +69,19 @@ find . \
  \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
  -exec chmod 644 {} \;
 
-./configure
+./configure \
+  --prefix=/usr \
+  --libdir=/usr/lib${LIBDIRSUFFIX} \
+  --sysconfdir=/etc \
+  --localstatedir=/var \
+  --mandir=/usr/man \
+  --docdir=/usr/doc/$PRGNAM-$VERSION \
+  --build=$ARCH-slackware-linux
 
-CFLAGS+="$SLKCFLAGS" \
-make
+sed -i "/^CFLAGS =/s|=|+=|" Makefile
+
+CFLAGS="$SLKCFLAGS" \
+  make
 
 make install PREFIX=/usr DESTDIR=$PKG
 
diff --git a/system/tmux/tmux.info b/system/tmux/tmux.info
index 04921e88bc..e884116bbd 100644
--- a/system/tmux/tmux.info
+++ b/system/tmux/tmux.info
@@ -1,8 +1,8 @@
 PRGNAM="tmux"
-VERSION="1.4"
+VERSION="1.5"
 HOMEPAGE="http://sourceforge.net/projects/tmux"
-DOWNLOAD="http://downloads.sourceforge.net/tmux/tmux-1.4.tar.gz"
-MD5SUM="0bfc7dd9a5bab192406167589c716a21"
+DOWNLOAD="http://downloads.sourceforge.net/tmux/tmux-1.5.tar.gz"
+MD5SUM="3d4b683572af34e83bc8b183a8285263"
 DOWNLOAD_x86_64=""
 MD5SUM_x86_64=""
 MAINTAINER="Bogdan Pangrati"