-1 in registry

I need to enter this as -1:
“SodimmCardDetect” = dword:X ; X = the SODIMM pin number of the CardDetect GPIO. -1 means no CardDetect pin ->fix inserted card.
How do enter a -1 in the registry. It won’t take negative.

Hi.

Entry in registry is DWORD and -1 is same as 0xFFFFFFFF.