diff --git a/crypto/x509/x509_req.c b/crypto/x509/x509_req.c
index c1a260881..31e59c49d 100644
--- a/crypto/x509/x509_req.c
+++ b/crypto/x509/x509_req.c
@@ -91,6 +91,8 @@ X509_REQ *X509_to_X509_REQ(X509 *x, EVP_PKEY *pkey, const EVP_MD *md)
         goto err;
 
     pktmp = X509_get_pubkey(x);
+    if (pktmp == NULL)
+        goto err;
     i = X509_REQ_set_pubkey(ret, pktmp);
     EVP_PKEY_free(pktmp);
     if (!i)