diff --git a/crypto/x509v3/v3_ncons.c b/crypto/x509v3/v3_ncons.c
index a01dc64dd..3b0f1bd1b 100644
--- a/crypto/x509v3/v3_ncons.c
+++ b/crypto/x509v3/v3_ncons.c
@@ -401,7 +401,7 @@ static int nc_dns(ASN1_IA5STRING *dns, ASN1_IA5STRING *base)
 	if (dns->length > base->length)
 		{
 		dnsptr += dns->length - base->length;
-		if (dnsptr[-1] != '.')
+		if (*baseptr != '.' && dnsptr[-1] != '.')
 			return X509_V_ERR_PERMITTED_VIOLATION;
 		}