diff --git a/iseq.c b/iseq.c
index 7d7398607e7ad4..868c4ee4f83e16 100644
--- a/iseq.c
+++ b/iseq.c
@@ -1312,7 +1312,7 @@ static const struct iseq_insn_info_entry *
 get_insn_info_linear_search(const rb_iseq_t *iseq, size_t pos)
 {
     size_t i = 0, size = iseq->body->insns_info_size;
-    const struct iseq_insn_info_entry *insns_info = iseq->body->insns_info;
+    const struct iseq_insn_info_entry *insns_info = iseq->body->insns_info.body;
     const int debug = 0;
 
     if (debug) {
diff --git a/version.h b/version.h
index 9b5193b609a68d..4d8f44f02ff164 100644
--- a/version.h
+++ b/version.h
@@ -1,10 +1,10 @@
 #define RUBY_VERSION "2.5.4"
-#define RUBY_RELEASE_DATE "2018-12-08"
-#define RUBY_PATCHLEVEL 120
+#define RUBY_RELEASE_DATE "2018-12-09"
+#define RUBY_PATCHLEVEL 121
 
 #define RUBY_RELEASE_YEAR 2018
 #define RUBY_RELEASE_MONTH 12
-#define RUBY_RELEASE_DAY 8
+#define RUBY_RELEASE_DAY 9
 
 #include "ruby/version.h"