diff --git a/academic/tilem/tilem.SlackBuild b/academic/tilem/tilem.SlackBuild
index 0aba11c26b..dfd9468239 100644
--- a/academic/tilem/tilem.SlackBuild
+++ b/academic/tilem/tilem.SlackBuild
@@ -21,13 +21,13 @@
 # that is unlikely, as I am rather tall.
 
 PRGNAM=tilem
-VERSION=0.973
+VERSION=${VERSION:-0.973}
 BUILD=${BUILD:-2}
 TAG=${TAG:-_SBo}
 
 if [ -z "$ARCH" ]; then
    case "$( uname -m )" in
-     i?86) ARCH=i486 ;;
+     i?86) ARCH=i586 ;;
      arm*) ARCH=arm ;;
         *) ARCH=$( uname -m ) ;;
    esac
@@ -38,8 +38,8 @@ TMP=${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=""
 elif [ "$ARCH" = "i686" ]; then
   SLKCFLAGS="-O2 -march=i686 -mtune=i686"