diff --git a/database/database.pgsql b/database/database.pgsql
index b94c2b746eeb7604f75f40141bce256e3b96b6c0..f767177cce6d22afdbe01e1d6ccff65c1abf5736 100644
--- a/database/database.pgsql
+++ b/database/database.pgsql
@@ -822,7 +822,7 @@ ALTER SEQUENCE menu_mid_seq RESTART 2;
 --- Functions
 ---
 
-CREATE FUNCTION greatest(integer, integer) RETURNS integer AS '
+CREATE FUNCTION "greatest"(integer, integer) RETURNS integer AS '
 BEGIN
   IF $2 IS NULL THEN
     RETURN $1;
@@ -834,7 +834,7 @@ BEGIN
 END;
 ' LANGUAGE 'plpgsql';
 
-CREATE FUNCTION greatest(integer, integer, integer) RETURNS integer AS '
+CREATE FUNCTION "greatest"(integer, integer, integer) RETURNS integer AS '
   SELECT greatest($1, greatest($2, $3));
 ' LANGUAGE 'sql';