ext/fast_mmaped_file/mmap.h in prometheus-client-mmap-0.7.0.beta45.6 vs ext/fast_mmaped_file/mmap.h in prometheus-client-mmap-0.7.0.beta45.7

@@ -29,9 +29,10 @@
     VALUE key;
     int semid, shmid;
     size_t len, real, incr;
     off_t offset;
     char *path, *template;
+    int fd;
 } mm_mmap;
 
 typedef struct {
     int count;
     mm_mmap *t;