1 files changed, 7 insertions, 0 deletions
diff --git a/vm_core.h b/vm_core.h
index 2d92d9b9f8..72e2bcb6fb 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -942,6 +942,10 @@ struct rb_ext_config {
 
 typedef struct rb_ractor_struct rb_ractor_t;
 
+#if defined(__linux__) || defined(__FreeBSD__)
+# define RB_THREAD_T_HAS_NATIVE_ID
+#endif
+
 typedef struct rb_thread_struct {
     struct list_node lt_node; // managed by a ractor
     VALUE self;
@@ -964,6 +968,9 @@ typedef struct rb_thread_struct {
 #ifdef NON_SCALAR_THREAD_ID
     rb_thread_id_string_t thread_id_string;
 #endif
+#ifdef RB_THREAD_T_HAS_NATIVE_ID
+    int tid;
+#endif
     BITFIELD(enum rb_thread_status, status, 2);
     /* bit flags */
     unsigned int to_kill : 1;