diff --git a/jsonfield/fields.py b/jsonfield/fields.py
index 4956405..d3ce732 100644
--- a/jsonfield/fields.py
+++ b/jsonfield/fields.py
@@ -139,12 +139,6 @@ def get_default(self):
         # If the field doesn't have a default, then we punt to models.Field.
         return super(JSONFieldBase, self).get_default()
 
-    def db_type(self, connection):
-        if connection.vendor == 'postgresql' and connection.pg_version >= 90300:
-            return 'json'
-        else:
-            return super(JSONFieldBase, self).db_type(connection)
-
 class JSONField(JSONFieldBase, models.TextField):
     """JSONField is a generic textfield that serializes/deserializes JSON objects"""
     form_class = JSONFormField