How to assign the leader key to the spacebar?

[a333klm]

I want to use the space bar as the leader key. The following did not work:
nnoreamap <SPACE BAR> <Nop>
let mapleader=<SPACE BAR>

With let mapleader="," I could assign it to the comma but with the spacebar the cursor just moves further or if i assign a command to r then it tries to replace the next character.

[frankbenoit]

nnoremap <SPACE> <Nop>
let mapleader=" "

This works for me. Is it still unsolved for you?