1 files changed, 5 insertions, 0 deletions
diff --git a/vm_core.h b/vm_core.h
index 8e34ff14a5..0a185a6ceb 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -144,6 +144,11 @@ void *rb_register_sigaltstack(void);
 #endif /* OPT_STACK_CACHING */
 #endif /* OPT_CALL_THREADED_CODE */
 
+#if OPT_DIRECT_THREADED_CODE || OPT_CALL_THREADED_CODE
+void rb_addr2insn_init(void);
+#else
+static inline void rb_addr2insn_init(void) { }
+#endif
 typedef unsigned long rb_num_t;
 typedef   signed long rb_snum_t;