1 files changed, 3 insertions, 7 deletions
diff --git a/vm_core.h b/vm_core.h
index 58fb1e7e3b..2fca0aecd2 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -101,9 +101,6 @@ extern int ruby_assert_critical_section_entered;
 #include "vm_opts.h"
 
 #include "ruby/thread_native.h"
-#include THREAD_IMPL_H
-
-#define RUBY_VM_THREAD_MODEL 2
 
 /*
  * implementation selector of get_insn_info algorithm
@@ -162,6 +159,9 @@ void *rb_register_sigaltstack(void *);
 #  define RB_ALTSTACK(var) (0)
 #endif
 
+#include THREAD_IMPL_H
+#define RUBY_VM_THREAD_MODEL 2
+
 /*****************/
 /* configuration */
 /*****************/
@@ -1072,10 +1072,6 @@ typedef struct rb_thread_struct {
     VALUE name;
 
     struct rb_ext_config ext_config;
-
-#ifdef USE_SIGALTSTACK
-    void *altstack;
-#endif
 } rb_thread_t;
 
 static inline unsigned int