diff --git a/libraries/eigen3/eigen3.SlackBuild b/libraries/eigen3/eigen3.SlackBuild
index 7e10d6b8b8..363f35b7ac 100644
--- a/libraries/eigen3/eigen3.SlackBuild
+++ b/libraries/eigen3/eigen3.SlackBuild
@@ -2,7 +2,7 @@
 
 # Copyright 2007, 2008  Robby Workman, Northport, Alabama, USA
 # Copyright 2008, 2009  Patrick J. Volkerding, Sebeka, MN, USA
-# Copyright 2012  Niels Horn, Rio de Janeiro, RJ, Brazil
+# Copyright 2012-2013  Niels Horn, Rio de Janeiro, RJ, Brazil
 # All rights reserved.
 
 # Redistribution and use of this script, with or without modification, is
@@ -22,13 +22,14 @@
 # OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 # ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+# revision date: 2013/03/30
 
 PRGNAM=eigen3
-VERSION=${VERSION:-3.0.4}
-BUILD=${BUILD:-2}
+VERSION=${VERSION:-3.1.2}
+BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
 
-TARVERSION=eigen-13a11181fc5a
+TARVERSION=eigen-5097c01bcdc4
 
 if [ -z "$ARCH" ]; then
   case "$( uname -m )" in
diff --git a/libraries/eigen3/eigen3.info b/libraries/eigen3/eigen3.info
index 35c3c205b4..c7c2320acb 100644
--- a/libraries/eigen3/eigen3.info
+++ b/libraries/eigen3/eigen3.info
@@ -1,8 +1,8 @@
 PRGNAM="eigen3"
-VERSION="3.0.4"
+VERSION="3.1.2"
 HOMEPAGE="http://eigen.tuxfamily.org"
-DOWNLOAD="http://bitbucket.org/eigen/eigen/get/3.0.4.tar.bz2"
-MD5SUM="c4a403660311ad8d62a28c118883310f"
+DOWNLOAD="http://bitbucket.org/eigen/eigen/get/3.1.2.tar.bz2"
+MD5SUM="e9c081360dde5e7dcb8eba3c8430fde2"
 DOWNLOAD_x86_64=""
 MD5SUM_x86_64=""
 REQUIRES=""
diff --git a/libraries/eigen3/slack-desc b/libraries/eigen3/slack-desc
index 989b43520f..50e1446adf 100644
--- a/libraries/eigen3/slack-desc
+++ b/libraries/eigen3/slack-desc
@@ -1,9 +1,9 @@
 # HOW TO EDIT THIS FILE:
-# The "handy ruler" below makes it easier to edit a package description.  Line
-# up the first '|' above the ':' following the base package name, and the '|'
-# on the right side marks the last column you can put a character in.  You must
-# make exactly 11 lines for the formatting to be correct.  It's also
-# customary to leave one space after the ':'.
+# The "handy ruler" below makes it easier to edit a package description.
+# Line up the first '|' above the ':' following the base package name, and
+# the '|' on the right side marks the last column you can put a character in.
+# You must make exactly 11 lines for the formatting to be correct.  It's also
+# customary to leave one space after the ':' except on otherwise blank lines.
 
       |-----handy-ruler------------------------------------------------------|
 eigen3: Eigen3 (c++ math library)