diff --git a/lib/sys/sys_mac.q b/lib/sys/sys_mac.q
index 9ef9e1f..25389b5 100644
--- a/lib/sys/sys_mac.q
+++ b/lib/sys/sys_mac.q
@@ -1,3 +1,7 @@
+fork() -> Int {
+	return syscall(0x2000002)
+}
+
 read(fd Int, address Pointer, length Int) -> Int {
 	return syscall(0x2000003, fd, address, length)
 }
@@ -22,6 +26,10 @@ munmap(address Pointer, length Int) -> Int {
 	return syscall(0x2000049, address, length)
 }
 
+execve(path Pointer, argv Pointer, envp Pointer) -> Int {
+	return syscall(0x2000059, path, argv, envp)
+}
+
 exit(status Int) {
 	syscall(0x2000001, status)
 }
\ No newline at end of file