diff --git a/gentoostrap.sh b/gentoostrap.sh
index 4e9ea82..14fd202 100755
--- a/gentoostrap.sh
+++ b/gentoostrap.sh
@@ -126,6 +126,8 @@ build-gentoo() {
 	# These is a very generic make.conf to get the system up and running
 	# We use march of x86-64 to ensure compatibility if we're bootstrapping on a host other than the target
 	cat <<-EOF > "$_optdest/etc/portage/make.conf"
+	# ABI_X86 is used to control multilib support
+	ABI_X86="64 32"
 	COMMON_FLAGS="-march=x86-64 -mtune=generic -O2 -pipe"
 	CFLAGS="\${COMMON_FLAGS}"
 	CXXFLAGS="\${COMMON_FLAGS}"