diff --git a/ext/openssl/ossl_pkcs7.c b/ext/openssl/ossl_pkcs7.c
index ae0d35b72..79bc5d76f 100644
--- a/ext/openssl/ossl_pkcs7.c
+++ b/ext/openssl/ossl_pkcs7.c
@@ -1055,7 +1055,7 @@ ossl_pkcs7ri_initialize(VALUE self, VALUE cert)
 
     x509 = GetX509CertPtr(cert); /* NO NEED TO DUP */
     GetPKCS7ri(self, p7ri);
-    if (!PKCS7_RECIP_INFO_set(p7ri, x509)) {
+    if (PKCS7_RECIP_INFO_set(p7ri, x509) <= 0) {
         ossl_raise(ePKCS7Error, NULL);
     }