Easy problem with raster calculation in ArcGIS

I am stuck at a very simple raster problem in ArcGIS. I have a raster layer with vales between 0 and 10. My second layer consists of 0's and 1's.

What I need is my first layer, but with 0's or NoData values where my second layer has 1's.

Could anyone give me a clue?!

Cheers