diff --git a/src/libstd/sys/redox/syscall/call.rs b/src/libstd/sys/redox/syscall/call.rs
index 0188d684d3a2d19b3ab6d3a0619e7d05d79788b4..61cd97d6d43858ab6875df067b1618a74a44a101 100644
--- a/src/libstd/sys/redox/syscall/call.rs
+++ b/src/libstd/sys/redox/syscall/call.rs
@@ -105,7 +105,7 @@ pub fn fcntl(fd: usize, cmd: usize, arg: usize) -> Result<usize> {
 }
 
 /// Replace the current process with a new executable
-pub fn fexec<T: AsRef<[u8]>>(fd: usize, args: &[[usize; 2]], vars: &[[usize; 2]]) -> Result<usize> {
+pub fn fexec(fd: usize, args: &[[usize; 2]], vars: &[[usize; 2]]) -> Result<usize> {
     unsafe { syscall5(SYS_FEXEC, fd, args.as_ptr() as usize, args.len(),
                       vars.as_ptr() as usize, vars.len()) }
 }