1 files changed, 0 insertions, 1 deletions
diff --git a/vm_core.h b/vm_core.h
index 548986dc56..af87f8a567 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -343,7 +343,6 @@ typedef struct rb_vm_struct {
     int running;
     int inhibit_thread_creation;
     int thread_abort_on_exception;
-    unsigned long trace_flag;
     volatile int sleeper;
 
     /* object management */