diff --git a/web/pgadmin/utils/driver/psycopg2/__init__.py b/web/pgadmin/utils/driver/psycopg2/__init__.py
index 1862e00..e010684 100644
--- a/web/pgadmin/utils/driver/psycopg2/__init__.py
+++ b/web/pgadmin/utils/driver/psycopg2/__init__.py
@@ -85,7 +85,10 @@ def register_string_typecasters(connection):
         return value
 
     cursor = connection.cursor()
-    cursor.execute('SELECT NULL::date, NULL::timestamp, NULL::timestamptz, NULL::bigint')
+    cursor.execute('SELECT NULL::date, NULL::timestamp,'
+                   'NULL::timestamptz, NULL::bigint',
+                   'NULL::numeric'
+                   )
     # Oid(s): Date, timestamp, timestamptz, bigint, double precision
     oids = (
         cursor.description[0][1], cursor.description[1][1],