#include "cache.h"
 #include "string-list.h"
 #include "mailmap.h"
+#include "object-store.h"
 
 #define DEBUG_MAILMAP 0
 #if DEBUG_MAILMAP
                             const char *name,
                             char **repo_abbrev)
 {
-       unsigned char sha1[20];
+       struct object_id oid;
        char *buf;
        unsigned long size;
        enum object_type type;
 
        if (!name)
                return 0;
-       if (get_sha1(name, sha1) < 0)
+       if (get_oid(name, &oid) < 0)
                return 0;
 
-       buf = read_sha1_file(sha1, &type, &size);
+       buf = read_object_file(&oid, &type, &size);
        if (!buf)
                return error("unable to read mailmap object at %s", name);
        if (type != OBJ_BLOB)