diff --git a/syscall/syscall_stublookup.c b/syscall/syscall_stublookup.c
index ed151d246bd..1d58924768e 100644
--- a/syscall/syscall_stublookup.c
+++ b/syscall/syscall_stublookup.c
@@ -150,7 +150,11 @@ uintptr_t STUB_nanosleep(int nbr, uintptr_t parm1, uintptr_t parm2);
  * NuttX configuration.
  */
 
-uintptr_t STUB_clock_systimer(int nbr);
+#ifdef CONFIG_SYSTEM_TIME64
+uintptr_t STUB_clock_systimer32(int nbr);
+#else
+uintptr_t STUB_clock_systimer64(int nbr);
+#endif
 uintptr_t STUB_clock_getres(int nbr, uintptr_t parm1, uintptr_t parm2);
 uintptr_t STUB_clock_gettime(int nbr, uintptr_t parm1, uintptr_t parm2);
 uintptr_t STUB_clock_settime(int nbr, uintptr_t parm1, uintptr_t parm2);