1 files changed, 1 insertions, 0 deletions
diff --git a/vm_core.h b/vm_core.h
index 286831feba..5cce489e21 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -551,6 +551,7 @@ typedef struct rb_thread_struct {
     rb_atomic_t interrupt_flag;
     unsigned long interrupt_mask;
     rb_thread_lock_t interrupt_lock;
+    rb_thread_cond_t interrupt_cond;
     struct rb_unblock_callback unblock;
     VALUE locking_mutex;
     struct rb_mutex_struct *keeping_mutexes;