1 files changed, 1 insertions, 1 deletions
diff --git a/signal.c b/signal.c
index 3477abb0f5..9815bd4bcd 100644
--- a/signal.c
+++ b/signal.c
@@ -271,7 +271,7 @@ static VALUE trap_list[NSIG];
 static rb_atomic_t trap_pending_list[NSIG];
 rb_atomic_t rb_trap_pending;
 rb_atomic_t rb_trap_immediate;
-int rb_prohibit_interrupt;
+int rb_prohibit_interrupt = 1;
 
 void
 rb_gc_mark_trap_list()