inherit with foreign key reference

dear readers,

i've created a simple Fooey table that inherits from Foo:
!----------------------------------------------------------!
CREATE TABLE Foo(
    fooid        serial UNIQUE,
    footype        text);
CREATE TABLE Fooey(
    data        text);
INHERITS(Foo);
!----------------------------------------------------------!

next i try to create a Bar table that references Fooey's fooid (inherited from Foo) as a foreign key:
!----------------------------------------------------------!
CREATE TABLE Bar(
    fooeyid     int REFERENCES Fooey(fooid));
!----------------------------------------------------------!

unfortunately i get the following error:
!----------------------------------------------------------!
ERROR:  there is no unique constraint matching given keys for referenced table "pagesrc"
!----------------------------------------------------------!

thoughts?

thanks,
aaron