diff --git a/src/sys/ptrace/linux.rs b/src/sys/ptrace/linux.rs
index d067ef5789..66372ea6d0 100644
--- a/src/sys/ptrace/linux.rs
+++ b/src/sys/ptrace/linux.rs
@@ -24,8 +24,7 @@ pub type AddressType = *mut ::libc::c_void;
 use libc::user_regs_struct;
 
 cfg_if! {
-    if #[cfg(any(all(target_os = "linux", target_arch = "s390x"),
-                 all(target_os = "linux", target_env = "gnu"),
+    if #[cfg(any(all(target_os = "linux", target_env = "gnu"),
                  target_env = "uclibc"))] {
         #[doc(hidden)]
         pub type RequestType = ::libc::c_uint;