diff --git a/ext/openssl/ossl_asn1.h b/ext/openssl/ossl_asn1.h
index 919ede0f3b5e86..8aad9f970d32fd 100644
--- a/ext/openssl/ossl_asn1.h
+++ b/ext/openssl/ossl_asn1.h
@@ -17,6 +17,11 @@
 VALUE asn1time_to_time(ASN1_TIME *);
 time_t time_to_time_t(VALUE);
 
+/*
+ * ASN1_STRING conversions
+ */
+VALUE asn1str_to_str(ASN1_STRING *);
+
 /*
  * ASN1_INTEGER conversions
  */
diff --git a/ext/openssl/ossl_pkcs7.h b/ext/openssl/ossl_pkcs7.h
index 9378397f2583c0..f5942d65db460b 100644
--- a/ext/openssl/ossl_pkcs7.h
+++ b/ext/openssl/ossl_pkcs7.h
@@ -13,7 +13,8 @@
 
 extern VALUE mPKCS7;
 extern VALUE cPKCS7;
-extern VALUE cPKCS7SignerInfo;
+extern VALUE cPKCS7Signer;
+extern VALUE cPKCS7Recipient;
 extern VALUE ePKCS7Error;
 
 void Init_ossl_pkcs7(void);