diff --git a/etc/build/gnuhurd/mk-release.sh b/etc/build/gnuhurd/mk-release.sh
index b804da2..003f0d3 100755
--- a/etc/build/gnuhurd/mk-release.sh
+++ b/etc/build/gnuhurd/mk-release.sh
@@ -15,7 +15,11 @@ fi
 
 rm -rf "out" && mkdir -p "out"
 
-mk_slunk "i686" "i686-gnu" "MARCH=pentiumpro MTUNE=pentium3"
+if [ "$(arch)" == "x86_64" ]; then
+	mk_slunk "x86_64" "x86_64-gnu" "MARCH=x86-64 MTUNE=nocona"
+else
+	mk_slunk "i686" "i686-gnu" "MARCH=pentiumpro MTUNE=pentium3"
+fi
 
 ./etc/build/build_info.sh "gcc" > "out/.build_info"