diff --git a/contrib/hstore/hstore.sql.in b/contrib/hstore/hstore.sql.in
index 95cecf15d2..4e7c494694 100644
--- a/contrib/hstore/hstore.sql.in
+++ b/contrib/hstore/hstore.sql.in
@@ -118,6 +118,12 @@ RETURNS hstore
 AS 'MODULE_PATHNAME'
 LANGUAGE 'C' with (isstrict,iscachable);
 
+-- For forward compatibility with PostgreSQL >= 9.0
+CREATE OR REPLACE FUNCTION hstore(text,text)
+RETURNS hstore
+AS 'MODULE_PATHNAME', 'tconvert'
+LANGUAGE C IMMUTABLE; -- not STRICT
+
 CREATE OPERATOR => (
 	LEFTARG = text,
 	RIGHTARG = text,
diff --git a/contrib/hstore/uninstall_hstore.sql b/contrib/hstore/uninstall_hstore.sql
index bfa2e738dc..f0b9fa5e7b 100644
--- a/contrib/hstore/uninstall_hstore.sql
+++ b/contrib/hstore/uninstall_hstore.sql
@@ -21,6 +21,7 @@ DROP FUNCTION hs_concat(hstore,hstore);
 DROP FUNCTION hs_contains(hstore,hstore);
 DROP FUNCTION hs_contained(hstore,hstore);
 DROP FUNCTION tconvert(text,text);
+DROP FUNCTION hstore(text,text);
 DROP FUNCTION akeys(hstore);
 DROP FUNCTION avals(hstore);
 DROP FUNCTION skeys(hstore);