diff --git a/crypto/x509v3/v3_ncons.c b/crypto/x509v3/v3_ncons.c
index 2fb8c98..c42a665 100644
--- a/crypto/x509v3/v3_ncons.c
+++ b/crypto/x509v3/v3_ncons.c
@@ -406,7 +406,7 @@
 	if (dns->length > base->length)
 		{
 		dnsptr += dns->length - base->length;
-		if (dnsptr[-1] != '.')
+		if (*baseptr != '.' && dnsptr[-1] != '.')
 			return X509_V_ERR_PERMITTED_VIOLATION;
 		}