diff --git a/src/unix/linux_like/linux/gnu/b32/x86/mod.rs b/src/unix/linux_like/linux/gnu/b32/x86/mod.rs
index 1d29ac2f542c82306d2b250503ae86acb128e58b..b1d306c81c91b793aaaf091d9fa12833514bebe5 100644
--- a/src/unix/linux_like/linux/gnu/b32/x86/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b32/x86/mod.rs
@@ -543,6 +543,8 @@ pub const FIONBIO: ::c_ulong = 0x5421;
 
 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;
diff --git a/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs b/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs
index ef4f1886ce29cba36d11cc64fc2ec3847dc1b988..f48d659f584affbe66394b7772c7be1fc78b94af 100644
--- a/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs
+++ b/src/unix/linux_like/linux/gnu/b64/x86_64/mod.rs
@@ -721,6 +721,8 @@ pub const PTRACE_SETFPXREGS: ::c_uint = 19;
 pub const PTRACE_GETREGS: ::c_uint = 12;
 pub const PTRACE_SETREGS: ::c_uint = 13;
 pub const PTRACE_PEEKSIGINFO_SHARED: ::c_uint = 1;
+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;