diff --git a/rpmpopt.in b/rpmpopt.in
index ca95702583..48c5c557a9 100644
--- a/rpmpopt.in
+++ b/rpmpopt.in
@@ -187,7 +187,7 @@ rpmbuild alias --buildpolicy --define '__os_install_post %{_rpmconfigdir}/brp-!#
 	--POPTargs=$"<policy>"
 # Minimally preserve rpmbuild's --sign functionality
 rpmbuild alias --sign \
-	--pipe "grep '.*: .*\.rpm$'|cut -d: -f2|xargs -r rpm --addsign" \
+	--pipe 'rpm --addsign `grep ".*: .*\.rpm$"|cut -d: -f2` < "/dev/"`ps -p $$ -o tty | tail -n 1`' \
 	--POPTdesc=$"generate GPG signature (deprecated, use command rpmsign instead)"
 
 rpmsign alias --key-id  --define '_gpg_name !#:+' \