diff --git a/academic/genometools/genometools.SlackBuild b/academic/genometools/genometools.SlackBuild
index 6bd3bdcfbd..e6ca3e09d0 100644
--- a/academic/genometools/genometools.SlackBuild
+++ b/academic/genometools/genometools.SlackBuild
@@ -23,13 +23,13 @@
 #  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 PRGNAM=genometools
-VERSION=${VERSION:-1.5.8}
+VERSION=${VERSION:-1.5.9}
 BUILD=${BUILD:-1}
 TAG=${TAG:-_SBo}
 
 if [ -z "$ARCH" ]; then
   case "$( uname -m )" in
-    i?86) ARCH=i486 ;;
+    i?86) ARCH=i586 ;;
     arm*) ARCH=arm ;;
        *) ARCH=$( uname -m ) ;;
   esac
@@ -40,8 +40,8 @@ TMP=${TMP:-/tmp/SBo}
 PKG=$TMP/package-$PRGNAM
 OUTPUT=${OUTPUT:-/tmp}
 
-if [ "$ARCH" = "i486" ]; then
-  SLKCFLAGS="-O2 -march=i486 -mtune=i686"
+if [ "$ARCH" = "i586" ]; then
+  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
   LIBDIRSUFFIX=""
   BUILDARCH="32bit=yes"
 elif [ "$ARCH" = "i686" ]; then
diff --git a/academic/genometools/genometools.info b/academic/genometools/genometools.info
index 4206a08c1e..8ddbba5e2b 100644
--- a/academic/genometools/genometools.info
+++ b/academic/genometools/genometools.info
@@ -1,8 +1,8 @@
 PRGNAM="genometools"
-VERSION="1.5.8"
+VERSION="1.5.9"
 HOMEPAGE="http://genometools.org/"
-DOWNLOAD="http://genometools.org/pub/genometools-1.5.8.tar.gz"
-MD5SUM="35e18e844d8b78ec0a53640fa0ace929"
+DOWNLOAD="http://genometools.org/pub/genometools-1.5.9.tar.gz"
+MD5SUM="e400d69092f9f13db09b33f9dea39d2e"
 DOWNLOAD_x86_64=""
 MD5SUM_x86_64=""
 REQUIRES=""
diff --git a/academic/genometools/slack-desc b/academic/genometools/slack-desc
index 047042e719..8f96c369c3 100644
--- a/academic/genometools/slack-desc
+++ b/academic/genometools/slack-desc
@@ -14,6 +14,6 @@ genometools: combined into a single binary named gt. It is based on a C
 genometools: library named "libgenometools" which consists of several modules.
 genometools:
 genometools: Home: http://genometools.org/
-genometools: References: /usr/doc/genometools-1.5.8/References
+genometools: References: /usr/doc/genometools-1.5.9/References
 genometools:
 genometools: