3 files changed, 8 insertions, 4 deletions
diff --git a/ext/digest/digest.c b/ext/digest/digest.c
index b6f5a56062..954ab81598 100644
--- a/ext/digest/digest.c
+++ b/ext/digest/digest.c
@@ -735,7 +735,7 @@ Init_digest(void)
     id_digest          = rb_intern("digest");
     id_hexdigest       = rb_intern("hexdigest");
     id_digest_length   = rb_intern("digest_length");
-    id_metadata        = rb_intern("metadata");
+    id_metadata        = rb_id_metadata();
     InitVM(digest);
 }
 
diff --git a/ext/digest/digest.h b/ext/digest/digest.h
index d9997b5db0..4b6954089f 100644
--- a/ext/digest/digest.h
+++ b/ext/digest/digest.h
@@ -56,3 +56,9 @@ rb_digest_namespace(void)
     rb_require("digest");
     return rb_path2class("Digest");
 }
+
+static inline ID
+rb_id_metadata(void)
+{
+    return rb_intern_const("metadata");
+}
diff --git a/ext/digest/sha2/sha2init.c b/ext/digest/sha2/sha2init.c
index 99450bb29e..7d211784a3 100644
--- a/ext/digest/sha2/sha2init.c
+++ b/ext/digest/sha2/sha2init.c
@@ -35,15 +35,13 @@ void
 Init_sha2(void)
 {
     VALUE mDigest, cDigest_Base;
-    ID id_metadata;
+    ID id_metadata = rb_id_metadata();
 
 #define DECLARE_ALGO_CLASS(bitlen) \
     VALUE cDigest_SHA##bitlen;
 
     FOREACH_BITLEN(DECLARE_ALGO_CLASS)
 
-    id_metadata = rb_intern_const("metadata");
-
     mDigest = rb_digest_namespace();
     cDigest_Base = rb_path2class("Digest::Base");