Gov. Pat Quinn has vetoed a piece of old gambling legislation that would have added five new casinos statewide and slot machines at horse racing tracks.

This was lawmakers' 2011 attempt, but it didn't go to Quinn's desk until the end of the session in January. Quinn had opposed the bill, saying it didn't contain enough ethical protections. He vetoed it Monday.

The legislation proposed more slot machines at existing casinos and allowed horse tracks to have them. Proponents estimated it would bring in $1.6 billion to pay down overdue bills and more than $500 million annually for schools and state-sponsored construction.

Quinn vetoed another gambling expansion attempt last year, saying it needed a ban on political contributions from the gambling industry.

A spokesman from Fairmount Park in Collinsville declined to comment Monday.

The state's five track operators, including Fairmount Park, have argued that creating these so-called "racinos" at Illinois horse tracks would help even the playing field because other tracks in Indiana and Iowa allow it. The tracks in neighboring states have been able to attract more horse owners because they can award higher purses, according to Illinois track owners.

On average, horse tracks in Iowa and Indiana awarded as much as three times the daily prize winnings of Illinois tracks because Iowa and Indiana tracks already have slots and can generate more revenue.