diff --git a/der2dsa.c b/der2dsa.c
index 61529b48a8df743dd9e2c86c34a634ae4485e3df..de8b4c85542ba7c5e5128444519a6c9e3ba0061a 100644
--- a/der2dsa.c
+++ b/der2dsa.c
@@ -84,7 +84,7 @@ dsa_private_key_from_der_iterator(struct dsa_public_key *pub,
   uint32_t version;
   
   return (i->type == ASN1_SEQUENCE
-	  asn1_der_decode_constructed_last(i) == ASN1_ITERATOR_PRIMITIVE
+	  && asn1_der_decode_constructed_last(i) == ASN1_ITERATOR_PRIMITIVE
 	  && i->type == ASN1_INTEGER
 	  && asn1_der_get_uint32(i, &version)
 	  && version == 0