diff --git a/src/call.rs b/src/call.rs
index 5150c2d..7ce3349 100644
--- a/src/call.rs
+++ b/src/call.rs
@@ -256,6 +256,11 @@ pub fn setreuid(ruid: usize, euid: usize) -> Result<usize> {
     unsafe { syscall2(SYS_SETREUID, ruid, euid) }
 }
 
+/// Set up a signal handler
+pub fn signal(sig: usize, handler: extern fn(usize)) -> Result<usize> {
+    unsafe { syscall2(SYS_SIGNAL, sig, handler as usize) }
+}
+
 /// Remove a file
 pub fn unlink<T: AsRef<[u8]>>(path: T) -> Result<usize> {
     unsafe { syscall2(SYS_UNLINK, path.as_ref().as_ptr() as usize, path.as_ref().len()) }
diff --git a/src/flag.rs b/src/flag.rs
index 7a92429..42d1ba6 100644
--- a/src/flag.rs
+++ b/src/flag.rs
@@ -1,6 +1,7 @@
 pub const CLONE_VM: usize = 0x100;
 pub const CLONE_FS: usize = 0x200;
 pub const CLONE_FILES: usize = 0x400;
+pub const CLONE_SIGHAND: usize = 0x800;
 pub const CLONE_VFORK: usize = 0x4000;
 
 pub const CLOCK_REALTIME: usize = 1;
@@ -84,4 +85,7 @@ pub const SIGIO: usize =    29;
 pub const SIGPWR: usize =   30;
 pub const SIGSYS: usize =   31;
 
+pub const SIG_DFL: usize = 0;
+pub const SIG_IGN: usize = 1;
+
 pub const WNOHANG: usize = 1;
diff --git a/src/number.rs b/src/number.rs
index b8cc0f0..5d656dc 100644
--- a/src/number.rs
+++ b/src/number.rs
@@ -61,5 +61,6 @@ pub const SYS_PIPE2: usize =    331;
 pub const SYS_SETREGID: usize = 204;
 pub const SYS_SETRENS: usize =  952;
 pub const SYS_SETREUID: usize = 203;
+pub const SYS_SIGNAL: usize =   48;
 pub const SYS_WAITPID: usize =  7;
 pub const SYS_YIELD: usize =    158;