1 files changed, 2 insertions, 0 deletions

diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c
index 31fb3235f552..4ae73c0e5485 100644
--- a/arch/um/os-Linux/time.c
+++ b/arch/um/os-Linux/time.c
@@ -66,6 +66,7 @@ void switch_timers(int to_real)
                        errno);
 }
 
+#ifdef UML_CONFIG_MODE_TT
 void uml_idle_timer(void)
 {
         if(signal(SIGVTALRM, SIG_IGN) == SIG_ERR)
@@ -75,6 +76,7 @@ void uml_idle_timer(void)
                     SA_RESTART, SIGUSR1, SIGIO, SIGWINCH, SIGVTALRM, -1);
         set_interval(ITIMER_REAL);
 }
+#endif
 
 unsigned long long os_nsecs(void)
 {