Problem initialing a unicode string

Question

Hey All. Atm im working with native API calls and i have to get RtlInitUnicodeString to work. The way i use:

const     WCHAR wcMutex[]  = L"String1"; 
UNICODE_STRING unicodeMutexBuffer; 
RtlInitUnicodeString(&unicodeMutexBuffer,wcMutex); 

now my problem the project doesnt compile , i get this error:

Error argument of type "UNICODE_STRING*" is incompatible with type of "PUNICODE_STRING"

but in my old Driver kit , i used same way to initialize the unicode string struct