diff --git a/srcpkgs/subtle/template b/srcpkgs/subtle/template
index 8b149483de1..b2f8b67c3c9 100644
--- a/srcpkgs/subtle/template
+++ b/srcpkgs/subtle/template
@@ -12,6 +12,9 @@ homepage="http://subtle.subforge.org"
 conf_files="/etc/xdg/subtle/subtle.rb"
 
 if [ "$CROSS_BUILD" ]; then
+	if [ "$XBPS_WORDSIZE" != "$XBPS_TARGET_WORDSIZE" ]; then
+		broken="Word size must match"
+	fi
 	hostmakedepends+=" $makedepends"
 	CFLAGS+=" -I${XBPS_CROSS_BASE}/usr/include/ruby-2.7.0/"
 	export CFLAGS