diff --git a/perl/perl-Cache-FastMmap/perl-Cache-FastMmap.SlackBuild b/perl/perl-Cache-FastMmap/perl-Cache-FastMmap.SlackBuild
index 3807c67b03..db2b1fe900 100644
--- a/perl/perl-Cache-FastMmap/perl-Cache-FastMmap.SlackBuild
+++ b/perl/perl-Cache-FastMmap/perl-Cache-FastMmap.SlackBuild
@@ -35,7 +35,7 @@ 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
@@ -50,8 +50,8 @@ set -e
 
 DOCS="Changes README"
 
-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"