THE CAPT OF AN MLG FAILED TO ENSURE THAT THE ADDITIONAL FUEL REQUIRED FOR MEL COMPLIANCE WAS ADDED PRIOR TO DEP. AFTER TKOF; THE COMPANY'S DISPATCH CALLED AND TOLD THE CREW TO RETURN FOR THE REQUIRED FUEL.

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INBOUND TO OAK WE HAD A #2 AFT FUEL BOOST PUMP FAILURE. WE READ THE QRH AND MEL AND FOLLOWED THE BOOK. WE WROTE IT UP AND GREEN STICKERED THE PUMP. WE THEN CALLED OAK OPS AND TOLD THEM TO CALL DISPATCH WITH A 28-1 MEL. WE ALSO ASKED TO ALERT MAINT THAT WE WOULD NEED A WHITE STICKER AND A TRACKING NUMBER. THEY SAID THEY WOULD GET IT DONE. UPON ARR MAINT VERIFIED THE PUMP INOP; WHITE STICKERED THE PUMP AND COLLARED THE CIRCUIT BREAKER. MAINT ENTERED THE TRACKING NUMBER AND THE MAINT CTL NUMBER IN THE LOGBOOK. I PUT THE TRACKING NUMBER ON THE DISPATCH RELEASE. I WENT INTO THE TERMINAL TO USE THE BATHROOM. WE HAD A 15 MIN TURN. WHEN I RETURNED TO THE COCKPIT WE DID THE BEFORE START CHKLIST. WHEN I CAME TO THE FUEL; I LOOKED AT THE RELEASE UPON WHICH I HAD WRITTEN THE MEL NUMBER AND THE TRACKING NUMBER AND CONSIDERED IT OK. AFTER TKOF; DISPATCH CALLED AND SAID WE NEEDED TO RETURN TO OAK. I REALIZED IMMEDIATELY THAT I HAD MADE A MISTAKE. WE RETURNED TO OAK IN 25 MINS. DISPATCH SAID WE NEEDED MORE FUEL. WE HAD PUSHED WITH STANDARD LEG FUEL OF 12200 LBS AND WE NEEDED TO ADD 8800 LBS TO COMPLY WITH THE MEL REQUIREMENTS. THIS MISTAKE WAS MY FAULT. I WAS A LITTLE TIRED; A LITTLE CRANKY; AND A LITTLE DISTRACTED. THIS INCIDENT HAS CAUSED ME TO TAKE A HARD LOOK AT MY THOROUGHNESS. AFTER FLYING FOR 25 YRS WITHOUT SO MUCH AS A BLOWN TIRE; THIS MISTAKE WILL MAKE ME A BETTER PLT.