diff --git a/src/thread/pthread_self.c b/src/thread/pthread_self.c
index 51f12bb3227951668c7e75273e9d868a58ca63f2..f68896f78dacd8b1e753e2145434cc1d3db5e566 100644
--- a/src/thread/pthread_self.c
+++ b/src/thread/pthread_self.c
@@ -8,6 +8,7 @@ weak_alias(dummy, __pthread_tsd_main);
 
 static int init_main_thread()
 {
+	__syscall(SYS_rt_sigprocmask, SIG_UNBLOCK, SIGPT_SET, 0, 8);
 	if (__set_thread_area(&main_thread) < 0) return -1;
 	main_thread.canceldisable = libc.canceldisable;
 	main_thread.tsd = (void **)__pthread_tsd_main;