Avoid compiler depend error

ref r64492

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64503 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/vm_core.h b/vm_core.h
index b936b0352b..1e27e7f839 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -879,7 +879,7 @@ typedef struct rb_thread_struct {
 #ifdef NON_SCALAR_THREAD_ID
     rb_thread_id_string_t thread_id_string;
 #endif
-    BITFIELD(enum rb_thread_status) status : 2;
+    BITFIELD(enum rb_thread_status, status, 2);
     /* bit flags */
     unsigned int to_kill : 1;
     unsigned int abort_on_exception: 1;