1 files changed, 1 insertions, 0 deletions
diff --git a/vm_core.h b/vm_core.h
index c3f5c013f9..b2ebbc8155 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -363,6 +363,7 @@ typedef struct rb_thread_struct
     int slice;
 
     native_thread_data_t native_thread_data;
+    void *blocking_region_buffer;
 
     VALUE thgroup;
     VALUE value;