diff --git a/lib/crypt.cpp b/lib/crypt.cpp
index 01249cfc340..9b1f69160b8 100644
--- a/lib/crypt.cpp
+++ b/lib/crypt.cpp
@@ -672,7 +672,7 @@ int check_validity_of_cert(
         }
 #ifdef HAVE_OPAQUE_RSA_DSA_DH
         RSA *rsa;
-        rsa = EVP_PKEY_get0_RSA(pubKey);
+        rsa = (rsa_st*)EVP_PKEY_get0_RSA(pubKey);
         if (!RSA_blinding_on(rsa, c)) {
 #else
         if (!RSA_blinding_on(pubKey->pkey.rsa, c)) {