diff --git a/c/sys/_wrap/fddef.c b/c/sys/_wrap/fddef.c
index d7f4999e..26ff237b 100644
--- a/c/sys/_wrap/fddef.c
+++ b/c/sys/_wrap/fddef.c
@@ -1,13 +1,13 @@
 #include <sys/types.h>
 
-int fd_isset(int n, fd_set *fd) {
+int llgo_FD_ISSET(int n, fd_set *fd) {
     return FD_ISSET(n, fd);
 }
 
-void fdSet(int n, fd_set *fd) {
+void llgo_FD_SET(int n, fd_set *fd) {
     FD_SET(n, fd);
 }
 
-void fd_zero(fd_set *fd) {
+void llgo_FD_ZERO(fd_set *fd) {
     FD_ZERO(fd);
-}
\ No newline at end of file
+}
diff --git a/c/sys/select.go b/c/sys/select.go
index 7cd7b9ea..2478e9b5 100644
--- a/c/sys/select.go
+++ b/c/sys/select.go
@@ -12,14 +12,23 @@ const (
 	LLGoPackage = "link"
 )
 
-//go:linkname FD_ZERO C.fd_zero
-func FD_ZERO(fdSet *syscall.FdSet)
+// -----------------------------------------------------------------------------
 
-//go:linkname FD_SET C.fdSet
-func FD_SET(fd c.Int, fdSet *syscall.FdSet)
+type (
+	FdSet   = syscall.FdSet
+	Timeval = syscall.Timeval
+)
 
-//go:linkname FD_ISSET C.fd_isset
-func FD_ISSET(fd c.Int, fdSet *syscall.FdSet) c.Int
+//go:linkname FD_ZERO C.llgo_FD_ZERO
+func FD_ZERO(fds *FdSet)
+
+//go:linkname FD_SET C.llgo_FD_SET
+func FD_SET(fd c.Int, fds *FdSet)
+
+//go:linkname FD_ISSET C.llgo_FD_ISSET
+func FD_ISSET(fd c.Int, fds *FdSet) c.Int
 
 //go:linkname Select C.select
-func Select(n c.Int, r *syscall.FdSet, w *syscall.FdSet, e *syscall.FdSet, timeout *syscall.Timeval) c.Int
+func Select(n c.Int, fdsRead, fdsWrite, fdsError *FdSet, timeout *Timeval) c.Int
+
+// -----------------------------------------------------------------------------