diff --git a/sendmail.spec b/sendmail.spec
index 0dd5d83..c04f7d7 100644
--- a/sendmail.spec
+++ b/sendmail.spec
@@ -158,7 +158,7 @@ define(\`confSTDIR', \`%{stdir}')
 define(\`STATUS_FILE', \`%{stdir}/statistics')
 EOF
 
-%ifarch ppc ppc64
+%ifarch ppc ppc64 s390x
 cat >> redhat.config.m4 << EOF
 APPENDDEF(\`confOPTIMIZE', \`-DSM_CONF_SHM=0')
 EOF
@@ -264,7 +264,7 @@ Make() {
 		LIBOWN=${nameuser}  LIBGRP=${namegroup} \
 		GBINOWN=${nameuser} GBINGRP=${namegroup} \
 		CFOWN=${nameuser}   CFGRP=${namegroup} \
-		MSPQOWN=${nameuser}
+		MSPQOWN=${nameuser} 
 }
 
 Make install -C $OBJDIR/libmilter