Astronaut Megan McArthur said "spaceflight is full lots of little challenges" and "this is just one more that we'll encounter and take care of in our mission".
Astronauts who are set to depart the International Space Station as early as this weekend will have to wear nappies on the way home because of their capsule's broken toilet.
NASA astronaut Megan McArthur described the situation as "suboptimal" but manageable on Friday.
The journey home could take up to 20 hours.
French astronaut Thomas Pesquet told reporters that the past six months have been intense in space. The astronauts conducted a series of spacewalks to upgrade the station's power grid, endured inadvertent thruster firings by docked Russian vehicles that sent the station into brief spins, and hosted a Russian film crew - a space station first.
They also had to deal with the toilet leak and pulling up panels in their SpaceX capsule and discovering pools of urine.
The problem was first noted during the craft's private flight in September, when a tube came unglued and spilled liquid beneath the floorboards.