Getting a conflicting types error when trying to include this data type in another header file I'm unsure why

Question

#ifndef CALLER_H_
#define CALLER_H_

#include "stdlib.h"
#include "cardCell.h"



#endif /* CALLER_H_ */


_______________________________________________________________


typedef struct
{
    int row;
    int col;
    char letter;
    char digit;
    bool matched;
} cardCellContent;

Getting a conflicting types error when trying to include this data type in another header file I'm unsure why.