diff --git a/libexec/rc/network.subr b/libexec/rc/network.subr
--- a/libexec/rc/network.subr
+++ b/libexec/rc/network.subr
@@ -1049,6 +1049,9 @@
 	# Process the last component if any.
 	if [ -n "${_tmpargs}" ]; then
 		case $_tmpargs in
+		${_af}\ pass\ *)
+			${IFCONFIG_CMD} $_if $_tmpargs $_action && _ret=0
+		;;
 		${_af}\ *[0-9a-fA-F]-*)
 			ifalias_af_common_handler $_if $_af $_action \
 			`ifalias_expand_addr $_af $_action ${_tmpargs#${_af}\ }`