Can't craft Nanosuit Helmet

When I try to craft the nanosuit helmet, will all of the correct components of course, it gives nothing. This is annoying, as I have the rest of the set complete, and I would like to finally craft this. I am not sure if this is a bug or not, so I decided to ask here. I am running Minecraft 1.7.10 with Forge 10.13.4.1448.

Yeah. Here you go.

That worked, clicking on the empty slot gave me the helmet. Thank you.