diff --git a/ruby/rubygem-sigdump/rubygem-sigdump.SlackBuild b/ruby/rubygem-sigdump/rubygem-sigdump.SlackBuild
index e4d2c77929..bb130d32e9 100644
--- a/ruby/rubygem-sigdump/rubygem-sigdump.SlackBuild
+++ b/ruby/rubygem-sigdump/rubygem-sigdump.SlackBuild
@@ -34,7 +34,7 @@ SRCNAM=sigdump
 
 if [ -z "$ARCH" ]; then
   case "$( uname -m )" in
-    i?86) ARCH=i486 ;;
+    i?86) ARCH=i586 ;;
     arm*) ARCH=arm ;;
        *) ARCH=$( uname -m ) ;;
   esac
@@ -52,8 +52,8 @@ TMP=${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"