diff --git a/libsrc/atari/settime.s b/libsrc/atari/settime.s
new file mode 100644
index 000000000..698aa2a29
--- /dev/null
+++ b/libsrc/atari/settime.s
@@ -0,0 +1,8 @@
+;
+; int clock_settime (clockid_t clk_id, const struct timespec *tp);
+;
+        .include "errno.inc"
+        .export _clock_settime
+_clock_settime:
+        lda     #ENOSYS
+        jmp     __directerrno