1 files changed, 1 insertions, 0 deletions
diff --git a/userland/libc/include/unistd.h b/userland/libc/include/unistd.h
index b44ca3e..3f17df4 100644
--- a/userland/libc/include/unistd.h
+++ b/userland/libc/include/unistd.h
@@ -15,6 +15,7 @@ int close(int fildes);
 int ftruncate(int fildes, size_t length);
 int execv(char *path, char **argv);
 int pipe(int fd[2]);
+int dup(int fildes);
 int dup2(int org_fd, int new_fd);
 int getopt(int argc, char *const argv[], const char *optstring);
 pid_t getpid(void);