Increase IBU after Cubing...into fermenter?

[Damn]

Did a brew last night and was bloody short of my 60min hops.
Needed 38g Styrian Goldings. Only had 14g. I bumped it up with another 10g of fuggles but they ran out too.
I have now cubed this brew. Is there any way I can bump up the IBU to the recipe? I plan to tip into the fermenter tonight.
Should I worry?

 

[IsonAd]

You could draw off a few litres into a pot and boil it up with some hops in additions that suit your intended IBUs.

 

[mkstalen]

Or grab some LDME make up 4L of wort and boil up some more hops.