diff --git a/src/unix/notbsd/linux/other/b32/x86.rs b/src/unix/notbsd/linux/other/b32/x86.rs
index 2a9626d04a13d9a7f52ea3cb7b60aebe5cb21078..86abd1eb10358b84ac85c2b75990406c2730e40a 100644
--- a/src/unix/notbsd/linux/other/b32/x86.rs
+++ b/src/unix/notbsd/linux/other/b32/x86.rs
@@ -130,8 +130,6 @@ pub const SYS_perf_event_open: ::c_long = 336;
 
 pub const PTRACE_GETFPXREGS: ::c_uint = 18;
 pub const PTRACE_SETFPXREGS: ::c_uint = 19;
-pub const PTRACE_SYSEMU: ::c_uint = 31;
-pub const PTRACE_SYSEMU_SINGLESTEP: ::c_uint = 32;
 
 pub const MCL_CURRENT: ::c_int = 0x0001;
 pub const MCL_FUTURE: ::c_int = 0x0002;