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-rw-r--r--thread_pthread.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/thread_pthread.c b/thread_pthread.c
index 6d700051a8..afc86ca035 100644
--- a/thread_pthread.c
+++ b/thread_pthread.c
@@ -1013,6 +1013,7 @@ ubf_select(void *ptr)
{
rb_thread_t *th = (rb_thread_t *)ptr;
add_signal_thread_list(th);
+ rb_thread_wakeup_timer_thread(); /* activate timer thread */
ubf_select_each(th);
}