Dr Mahathir Mohamad slaps his forehead after embarrassingly referring to Amanah president Mohamad Sabu as "Umno" president - Petaling Jaya, Friday, July 14, 2017.

The slip-of-tongue sparked roaring laughter at the midnight press conference at the PKR headquarter. 

The press conference was held after Pakatan Harapan's leadership council meeting where the coalition's organisational structure was finalised at long last.

Agreeing to the leadership line-up has been a long process for the fledging opposition coalition made up of one-time enemies.