diff --git a/crypto/objects/obj_xref.c b/crypto/objects/obj_xref.c
index 152eca5c6..9f744bced 100644
--- a/crypto/objects/obj_xref.c
+++ b/crypto/objects/obj_xref.c
@@ -110,8 +110,10 @@ int OBJ_find_sigid_algs(int signid, int *pdig_nid, int *ppkey_nid)
 #endif
 	if (rv == NULL)
 		return 0;
-	*pdig_nid = rv->hash_id;
-	*ppkey_nid = rv->pkey_id;
+	if (pdig_nid)
+		*pdig_nid = rv->hash_id;
+	if (ppkey_nid)
+		*ppkey_nid = rv->pkey_id;
 	return 1;
 	}
 
@@ -144,7 +146,8 @@ int OBJ_find_sigid_by_algs(int *psignid, int dig_nid, int pkey_nid)
 #endif
 	if (rv == NULL)
 		return 0;
-	*psignid = (*rv)->sign_id;
+	if (psignid)
+		*psignid = (*rv)->sign_id;
 	return 1;
 	}
 
diff --git a/crypto/x509/x509type.c b/crypto/x509/x509type.c
index 3385ad3f6..9702ec531 100644
--- a/crypto/x509/x509type.c
+++ b/crypto/x509/x509type.c
@@ -100,20 +100,26 @@ int X509_certificate_type(X509 *x, EVP_PKEY *pkey)
 		break;
 		}
 
-	i=X509_get_signature_type(x);
-	switch (i)
+	i=OBJ_obj2nid(x->sig_alg->algorithm);
+	if (i && OBJ_find_sigid_algs(i, NULL, &i))
 		{
-	case EVP_PKEY_RSA:
-		ret|=EVP_PKS_RSA;
-		break;
-	case EVP_PKEY_DSA:
-		ret|=EVP_PKS_DSA;
-		break;
-	case EVP_PKEY_EC:
-		ret|=EVP_PKS_EC;
-		break;
-	default:
-		break;
+
+		switch (i)
+			{
+		case NID_rsaEncryption:
+		case NID_rsa:
+			ret|=EVP_PKS_RSA;
+			break;
+		case NID_dsa:
+		case NID_dsa_2:
+			ret|=EVP_PKS_DSA;
+			break;
+		case NID_X9_62_id_ecPublicKey:
+			ret|=EVP_PKS_EC;
+			break;
+		default:
+			break;
+			}
 		}
 
 	if (EVP_PKEY_size(pk) <= 1024/8)/* /8 because it's 1024 bits we look