diff --git a/desktop/gtk-engines-unico/gtk-engines-unico.SlackBuild b/desktop/gtk-engines-unico/gtk-engines-unico.SlackBuild
index c78a67a29c..809eb3143b 100644
--- a/desktop/gtk-engines-unico/gtk-engines-unico.SlackBuild
+++ b/desktop/gtk-engines-unico/gtk-engines-unico.SlackBuild
@@ -31,7 +31,7 @@ PKGTYPE=${PKGTYPE:-tgz}
 
 if [ -z "$ARCH" ]; then
   case "$( uname -m )" in
-    i?86) ARCH=i486 ;;
+    i?86) ARCH=i586 ;;
     arm*) ARCH=arm ;;
        *) ARCH=$( uname -m ) ;;
   esac
@@ -49,8 +49,8 @@ TMP=${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"