diff --git a/src/call.rs b/src/call.rs
index 244d421cd0..75fdc194f1 100644
--- a/src/call.rs
+++ b/src/call.rs
@@ -6,12 +6,6 @@ use super::number::*;
 
 use core::{mem, ptr};
 
-// Signal restorer
-extern "C" fn restorer() -> ! {
-    sigreturn().unwrap();
-    unreachable!();
-}
-
 /// Close a file
 pub fn close(fd: usize) -> Result<usize> {
     unsafe { syscall1(SYS_CLOSE, fd) }
@@ -235,26 +229,6 @@ pub fn setreuid(ruid: usize, euid: usize) -> Result<usize> {
     unsafe { syscall2(SYS_SETREUID, ruid, euid) }
 }
 
-/// Set up a signal handler
-pub fn sigaction(sig: usize, act: Option<&SigAction>, oldact: Option<&mut SigAction>) -> Result<usize> {
-    unsafe { syscall4(SYS_SIGACTION, sig,
-                      act.map(|x| x as *const _).unwrap_or_else(ptr::null) as usize,
-                      oldact.map(|x| x as *mut _).unwrap_or_else(ptr::null_mut) as usize,
-                      restorer as usize) }
-}
-
-/// Get and/or set signal masks
-pub fn sigprocmask(how: usize, set: Option<&u64>, oldset: Option<&mut u64>) -> Result<usize> {
-    unsafe { syscall3(SYS_SIGPROCMASK, how,
-                      set.map(|x| x as *const _).unwrap_or_else(ptr::null) as usize,
-                      oldset.map(|x| x as *mut _).unwrap_or_else(ptr::null_mut) as usize) }
-}
-
-// Return from signal handler
-pub fn sigreturn() -> Result<usize> {
-    unsafe { syscall0(SYS_SIGRETURN) }
-}
-
 /// Set the file mode creation mask
 pub fn umask(mask: usize) -> Result<usize> {
     unsafe { syscall1(SYS_UMASK, mask) }
diff --git a/src/number.rs b/src/number.rs
index 93f5bee508..136dcbe130 100644
--- a/src/number.rs
+++ b/src/number.rs
@@ -84,9 +84,6 @@ pub const SYS_SETPGID: usize =  57;
 pub const SYS_SETREGID: usize = 204;
 pub const SYS_SETRENS: usize =  952;
 pub const SYS_SETREUID: usize = 203;
-pub const SYS_SIGACTION: usize =67;
-pub const SYS_SIGPROCMASK:usize=126;
-pub const SYS_SIGRETURN: usize =119;
 pub const SYS_UMASK: usize =    60;
 pub const SYS_WAITPID: usize =  7;
 pub const SYS_YIELD: usize =    158;