diff --git a/mb_netmgmt/snmp.py b/mb_netmgmt/snmp.py
index bc99b25..57f1d48 100644
--- a/mb_netmgmt/snmp.py
+++ b/mb_netmgmt/snmp.py
@@ -111,8 +111,7 @@ def translate_json_to_network_response(self, json):
                 value = b64decode(value, validate=True)
             except (binascii.Error, TypeError):
                 pass
-            asn1_class = ASN1_Class_UNIVERSAL.__dict__[response["tag"]]
-            result += SNMPvarbind(oid=oid, value=asn1_class.asn1_object(value))
+            result += to_varbind(oid, value, response["tag"])
         return result
 
 
@@ -142,3 +141,8 @@ def to_dict(varbind):
     if varbind.endOfMibView:
         result["endOfMibView"] = 0
     return result
+
+
+def to_varbind(oid, value, tag):
+    asn1_class = ASN1_Class_UNIVERSAL.__dict__[tag]
+    return SNMPvarbind(oid=oid, value=asn1_class.asn1_object(value))
diff --git a/test/test_mb_netmgmt.py b/test/test_mb_netmgmt.py
index 7a1f44e..b898f9d 100644
--- a/test/test_mb_netmgmt.py
+++ b/test/test_mb_netmgmt.py
@@ -259,3 +259,8 @@ def test_no_such_instance_to_dict():
     varbind = SNMPvarbind(value=None, noSuchInstance=ASN1_NULL(0))
     result = snmp.to_dict(varbind)
     assert result == {"tag": None, "val": None, "noSuchInstance": 0}
+
+
+def test_to_varbind():
+    result = snmp.to_varbind("1.3", 0, "NULL")
+    assert result == SNMPvarbind(oid="1.3", value=0)