struct instance "undeclared" (first use in this function)

I'm having trouble getting some code to compile...the following code gives me the error:
'Chunk' undeclared (first use in this function)
when compiled with "make" in cygwin.

Code:

---


//create structure for holding chunk data
struct Chunk
{
        unsigned short ID; //first two bytes
        unsigned int size; //last four bytes
};

int main() {
        pspDebugScreenInit();
        SetupCallbacks();
        printf("3DS Loader version 0.1\n");
        printf("======================\n");
        printf("by David Reicher\n");

        //setup file name
        char* filename;
        filename = "ms0:/xwing.3ds";
        int fdin;
       

        //open file and start reading
        fdin = sceIoOpen(filename, PSP_O_RDONLY, 0777);
        if(fdin >= 0)
        {
                printf("File opened %s\n\n", filename);
               
               
                Chunk firstChunk;

                int bytes_read = 1;
                bytes_read = sceIoRead(fdin, &firstChunk->ID, sizeof(firstChunk->ID));
                printf("ID: 0x%x\n", firstChunk.ID);
                bytes_read = sceIoRead(fdin, &firstChunk->size, sizeof(firstChunk->size));
                printf("Chunksize: %u\n", firstchunk.size);
        }
        else
        {
                printf("Couldn't open %s\n", filename);
        }


        //wait for home button push, then exit
        sceKernelSleepThread();
        return 0;
}

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I know I'm probably doing something stupid (I'm kind of a newbie), but could anyone give me some advice on where I'm going wrong?

Code:

---

Chunk firstChunk;

---

should be

Code:

---

struct Chunk firstChunk;

---

Thanks :) its working fine now (also the last "firstchunk" used should have been "firstChunk").