diff --git a/vm_core.h b/vm_core.h
index a76f57e596..4338d65d5e 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -552,6 +552,9 @@ struct rb_iseq_struct {
 #define USE_LAZY_LOAD 0
 #endif
 
+#if !USE_LAZY_LOAD
+static inline const rb_iseq_t *rb_iseq_complete(const rb_iseq_t *iseq) {return 0;}
+#endif
 const rb_iseq_t *rb_iseq_complete(const rb_iseq_t *iseq);
 
 static inline const rb_iseq_t *