1 files changed, 2 insertions, 2 deletions
diff --git a/ext/openssl/ossl_config.c b/ext/openssl/ossl_config.c
index 21c327b26b..0e598b4d51 100644
--- a/ext/openssl/ossl_config.c
+++ b/ext/openssl/ossl_config.c
@@ -22,7 +22,7 @@ static const rb_data_type_t ossl_config_type = {
     {
         0, nconf_free,
     },
-    0, 0, RUBY_TYPED_FREE_IMMEDIATELY,
+    0, 0, RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_WB_PROTECTED,
 };
 
 CONF *
@@ -60,7 +60,7 @@ config_load_bio(CONF *conf, BIO *bio)
         if (eline <= 0)
             ossl_raise(eConfigError, "wrong config format");
         else
-            ossl_raise(eConfigError, "error in line %d", eline);
+            ossl_raise(eConfigError, "error in line %ld", eline);
     }
     BIO_free(bio);