diff --git a/Cargo.toml b/Cargo.toml
index 0825d75..aabebc5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "redox_syscall"
-version = "0.1.6"
+version = "0.1.7"
 description = "A Rust library to access raw Redox system calls"
 license = "MIT"
 authors = ["Jeremy Soller <jackpot51@gmail.com>"]
diff --git a/src/call.rs b/src/call.rs
index a2a00a8..c75fd9f 100644
--- a/src/call.rs
+++ b/src/call.rs
@@ -216,14 +216,14 @@ pub fn rmdir(path: &str) -> Result<usize> {
     unsafe { syscall2(SYS_RMDIR, path.as_ptr() as usize, path.len()) }
 }
 
-/// Set the current process group ID
-pub fn setgid(gid: usize) -> Result<usize> {
-    unsafe { syscall1(SYS_SETGID, gid) }
+/// Set the current process group IDs
+pub fn setregid(rgid: usize, egid: usize) -> Result<usize> {
+    unsafe { syscall2(SYS_SETREGID, rgid, egid) }
 }
 
-/// Set the current process user ID
-pub fn setuid(uid: usize) -> Result<usize> {
-    unsafe { syscall1(SYS_SETUID, uid) }
+/// Set the current process user IDs
+pub fn setreuid(ruid: usize, euid: usize) -> Result<usize> {
+    unsafe { syscall2(SYS_SETREUID, ruid, euid) }
 }
 
 /// Create and set a new scheme namespace
diff --git a/src/number.rs b/src/number.rs
index cab0cf4..4f496fe 100644
--- a/src/number.rs
+++ b/src/number.rs
@@ -53,8 +53,8 @@ pub const SYS_PHYSMAP: usize =  947;
 pub const SYS_PHYSUNMAP: usize =948;
 pub const SYS_VIRTTOPHYS: usize=949;
 pub const SYS_PIPE2: usize =    331;
-pub const SYS_SETGID: usize =   214;
-pub const SYS_SETUID: usize =   213;
+pub const SYS_SETREGID: usize =   204;
+pub const SYS_SETREUID: usize =   203;
 pub const SYS_SETNS: usize =    310;
 pub const SYS_WAITPID: usize =  7;
 pub const SYS_YIELD: usize =    158;