diff --git a/src/libopensc/asn1.c b/src/libopensc/asn1.c
index 75a25d50..85319fea 100644
--- a/src/libopensc/asn1.c
+++ b/src/libopensc/asn1.c
@@ -1659,3 +1659,23 @@ sc_der_copy(sc_pkcs15_der_t *dst, const sc_pkcs15_der_t *src)
 	return SC_SUCCESS;
 }
 
+int
+sc_encode_oid (struct sc_context *ctx, struct sc_object_id *id, 
+		unsigned char **out, size_t *size)
+{
+	static const struct sc_asn1_entry c_asn1_object_id[2] = {
+        	{ "oid", SC_ASN1_OBJECT, SC_ASN1_TAG_OBJECT, SC_ASN1_ALLOC, NULL, NULL },
+		{ NULL, 0, 0, 0, NULL, NULL }
+	};
+	struct sc_asn1_entry asn1_object_id[2];
+	int rv;
+
+	sc_copy_asn1_entry(c_asn1_object_id, asn1_object_id);
+	sc_format_asn1_entry(asn1_object_id + 0, id, NULL, 1);
+
+	rv = _sc_asn1_encode(ctx, asn1_object_id, out, size, 1);
+	LOG_TEST_RET(ctx, rv, "Cannot encode object ID");
+
+	return SC_SUCCESS;
+}
+
diff --git a/src/libopensc/libopensc.exports b/src/libopensc/libopensc.exports
index e75160bd..da90dfc4 100644
--- a/src/libopensc/libopensc.exports
+++ b/src/libopensc/libopensc.exports
@@ -82,6 +82,7 @@ sc_disconnect_card
 sc_do_log
 _sc_debug
 sc_enum_apps
+sc_encode_oid
 sc_parse_ef_atr
 sc_establish_context
 sc_file_add_acl_entry
diff --git a/src/libopensc/pkcs15.h b/src/libopensc/pkcs15.h
index e1748dec..3829272b 100644
--- a/src/libopensc/pkcs15.h
+++ b/src/libopensc/pkcs15.h
@@ -777,6 +777,8 @@ int sc_der_copy(sc_pkcs15_der_t *, const sc_pkcs15_der_t *);
 int sc_pkcs15_get_object_id(const struct sc_pkcs15_object *, struct sc_pkcs15_id *);
 int sc_pkcs15_get_guid(struct sc_pkcs15_card *, const struct sc_pkcs15_object *, 
 		char *, size_t);
+int sc_encode_oid (struct sc_context *, struct sc_object_id *, 
+		unsigned char **, size_t *);
 
 /* Prepend 'parent' to 'child' in case 'child' is a relative path */
 int sc_pkcs15_make_absolute_path(const sc_path_t *parent, sc_path_t *child);