1 files changed, 2 insertions, 0 deletions
diff --git a/iseq.h b/iseq.h
index 7c6b56a1d4..eba17168eb 100644
--- a/iseq.h
+++ b/iseq.h
@@ -143,7 +143,9 @@ VALUE iseq_ibf_dump(const rb_iseq_t *iseq, VALUE opt);
 void ibf_load_iseq_complete(rb_iseq_t *iseq);
 const rb_iseq_t *iseq_ibf_load(VALUE str);
 VALUE iseq_ibf_load_extra_data(VALUE str);
+#if VM_INSN_INFO_TABLE_IMPL == 2
 unsigned int *rb_iseq_insns_info_decode_positions(const struct rb_iseq_constant_body *body);
+#endif
 
 RUBY_SYMBOL_EXPORT_BEGIN