diff --git a/include/sys/amd64/sys_file.h b/include/sys/amd64/sys_file.h
index dab0c30..2f636a6 100644
--- a/include/sys/amd64/sys_file.h
+++ b/include/sys/amd64/sys_file.h
@@ -36,6 +36,3 @@ int sys_chown(const char *path, uid_t uid, gid_t gid);
 off_t sys_lseek(int fd, off_t offset, int whence);
 
 int sys_ioctl(int fd, unsigned int cmd, void *arg);
-
-// XXX: Will be removed once ioctl(fd, TCGETS, ...) is possible
-int sys_isatty(int fd);
diff --git a/include/sys/syscall.h b/include/sys/syscall.h
index ac713e7..30f0df2 100644
--- a/include/sys/syscall.h
+++ b/include/sys/syscall.h
@@ -18,7 +18,6 @@
 #define SYSCALL_NR_READDIR      89
 #define SYSCALL_NR_CHMOD        90
 #define SYSCALL_NR_CHOWN        92
-#define SYSCALL_NRX_ISATTY      248
 
 #define SYSCALL_NR_BRK          12
 #define SYSCALL_NR_NANOSLEEP    35
diff --git a/sys/amd64/sys_file.c b/sys/amd64/sys_file.c
index 0980641..60581a4 100644
--- a/sys/amd64/sys_file.c
+++ b/sys/amd64/sys_file.c
@@ -306,29 +306,3 @@ int sys_ioctl(int fd, unsigned int cmd, void *arg) {
 
     return vfs_ioctl(&thr->ioctx, of, cmd, arg);
 }
-
-int sys_isatty(int fd) {
-    struct thread *thr = get_cpu()->thread;
-    struct ofile *of;
-    _assert(thr);
-
-    if (fd < 0 || fd >= THREAD_MAX_FDS) {
-        return -EBADF;
-    }
-
-    if (!(of = thr->fds[fd])) {
-        return -EBADF;
-    }
-
-    _assert(of->vnode);
-    if (of->vnode->type == VN_CHR) {
-        struct chrdev *chr = of->vnode->dev;
-        _assert(chr);
-
-        // TODO: somehow check that this is a tty
-        //       via flags
-        return 1;
-    }
-
-    return -ENOTTY;
-}
diff --git a/sys/amd64/syscall.c b/sys/amd64/syscall.c
index c087d9b..4708174 100644
--- a/sys/amd64/syscall.c
+++ b/sys/amd64/syscall.c
@@ -31,7 +31,6 @@ const void *amd64_syscall_jmp_table[256] = {
     [SYSCALL_NR_RMDIR] = sys_rmdir,
     [SYSCALL_NR_CHMOD] = sys_chmod,
     [SYSCALL_NR_CHOWN] = sys_chown,
-    [SYSCALL_NRX_ISATTY] = sys_isatty,
 
     // Process
     [SYSCALL_NR_EXIT] = sys_exit,