diff --git a/include/sys/syscall_lookup.h b/include/sys/syscall_lookup.h
index 8b1e1b31587..279671d4ec6 100644
--- a/include/sys/syscall_lookup.h
+++ b/include/sys/syscall_lookup.h
@@ -27,6 +27,7 @@
 SYSCALL_LOOKUP1(_exit,                     1)
 SYSCALL_LOOKUP(exit,                       1)
 SYSCALL_LOOKUP(getpid,                     0)
+SYSCALL_LOOKUP(gettid,                     0)
 
 SYSCALL_LOOKUP(sched_getparam,             2)
 SYSCALL_LOOKUP(sched_getscheduler,         1)