diff --git a/src/test/codegen/x86_mmx.rs b/src/test/codegen/x86_mmx.rs
index 4424c30e0f8..0fd3d542438 100644
--- a/src/test/codegen/x86_mmx.rs
+++ b/src/test/codegen/x86_mmx.rs
@@ -18,6 +18,7 @@
 // ignore-powerpc64le
 // ignore-sparc
 // ignore-sparc64
+// ignore-s390x
 // compile-flags: -O
 
 #![feature(repr_simd)]