diff --git a/s390x/memxor.asm b/s390x/memxor.asm
index 3f28fdff26327f122cebb7f858bdaacd054408a5..acc7b03ddf7b034c62fbfdb7f878853397bdccc6 100644
--- a/s390x/memxor.asm
+++ b/s390x/memxor.asm
@@ -30,6 +30,7 @@ ifelse(`
 ')
 
 .file "memxor.asm"
+.machine "z10"
 
 .text