diff --git a/contrib/hstore/hstore--1.1--1.2.sql b/contrib/hstore/hstore--1.1--1.2.sql
new file mode 100644
index 0000000000..99b8a168fa
--- /dev/null
+++ b/contrib/hstore/hstore--1.1--1.2.sql
@@ -0,0 +1,47 @@
+/* contrib/hstore/hstore--1.1--1.2.sql */
+
+-- complain if script is sourced in psql, rather than via ALTER EXTENSION
+\echo Use "ALTER EXTENSION hstore UPDATE TO '1.2'" to load this file. \quit
+
+
+-- A version of 1.1 was shipped with these objects mistakenly in 9.3.0.
+-- Therefore we only add them if we detect that they aren't already there and 
+-- dependent on the extension.
+
+DO LANGUAGE plpgsql
+
+$$
+
+BEGIN
+
+   PERFORM 1
+   FROM pg_proc p
+       JOIN  pg_depend d
+          ON p.proname = 'hstore_to_json_loose'
+            AND d.objid = p.oid
+            AND d.refclassid = 'pg_extension'::regclass
+       JOIN pg_extension x
+          ON d.refobjid = x.oid
+            AND  x.extname = 'hstore';
+
+   IF NOT FOUND
+   THEN 
+
+        CREATE FUNCTION hstore_to_json(hstore)
+        RETURNS json
+        AS 'MODULE_PATHNAME', 'hstore_to_json'
+        LANGUAGE C IMMUTABLE STRICT;
+
+        CREATE CAST (hstore AS json)
+          WITH FUNCTION hstore_to_json(hstore);
+
+        CREATE FUNCTION hstore_to_json_loose(hstore)
+        RETURNS json
+        AS 'MODULE_PATHNAME', 'hstore_to_json_loose'
+        LANGUAGE C IMMUTABLE STRICT;
+
+   END IF;
+
+END;
+
+$$;
diff --git a/contrib/hstore/hstore--1.1.sql b/contrib/hstore/hstore--1.2.sql
similarity index 100%
rename from contrib/hstore/hstore--1.1.sql
rename to contrib/hstore/hstore--1.2.sql
diff --git a/contrib/hstore/hstore.control b/contrib/hstore/hstore.control
index 4104e17e29..9daf5e2e00 100644
--- a/contrib/hstore/hstore.control
+++ b/contrib/hstore/hstore.control
@@ -1,5 +1,5 @@
 # hstore extension
 comment = 'data type for storing sets of (key, value) pairs'
-default_version = '1.1'
+default_version = '1.2'
 module_pathname = '$libdir/hstore'
 relocatable = true