diff --git a/libsosapi/include/syscalls.h b/libsosapi/include/syscalls.h
index 1a341a5..45a609d 100644
--- a/libsosapi/include/syscalls.h
+++ b/libsosapi/include/syscalls.h
@@ -35,3 +35,5 @@ long sys_brk(va_list ap);
 long sys_mmap(va_list ap);
 long sys_writev(va_list ap);
 long sys_write(va_list ap);
+long sys_nanosleep(va_list ap);
+long sys_clock_gettime(va_list ap);
diff --git a/libsosapi/src/vsyscall.c b/libsosapi/src/vsyscall.c
index 13f7fb4..b4514b8 100644
--- a/libsosapi/src/vsyscall.c
+++ b/libsosapi/src/vsyscall.c
@@ -35,5 +35,8 @@ void sosapi_init_syscall_table(void)
     muslcsys_install_syscall(__NR_writev, sys_writev);
     muslcsys_install_syscall(__NR_write, sys_write);
     muslcsys_install_syscall(__NR_set_tid_address, sys_set_tid_address);
+    muslcsys_install_syscall(__NR_nanosleep, sys_nanosleep);
+    muslcsys_install_syscall(__NR_clock_gettime, sys_clock_gettime);
+    muslcsys_install_syscall(__NR_tkill, sys_tgkill);
     sel4runtime_set_exit(exit);
 }