diff --git a/src/runtime/os2_linux_generic.go b/src/runtime/os2_linux_generic.go
index 01e6c8a..f1a2dd5 100644
--- a/src/runtime/os2_linux_generic.go
+++ b/src/runtime/os2_linux_generic.go
@@ -4,6 +4,7 @@
 
 // +build !mips64
 // +build !mips64le
+// +build !s390x
 // +build linux
 
 package runtime