diff --git a/source3/include/proto.h b/source3/include/proto.h
index 84d19e4277d..8b387f7c563 100644
--- a/source3/include/proto.h
+++ b/source3/include/proto.h
@@ -222,6 +222,7 @@ int sys_fcntl_long(int fd, int cmd, long arg);
 void update_stat_ex_mtime(struct stat_ex *dst, struct timespec write_ts);
 void update_stat_ex_itime(struct stat_ex *dst, struct timespec itime);
 void update_stat_ex_create_time(struct stat_ex *dst, struct timespec create_time);
+void update_stat_ex_file_id(struct stat_ex *dst, uint64_t file_id);
 int sys_stat(const char *fname, SMB_STRUCT_STAT *sbuf,
 	     bool fake_dir_create_times);
 int sys_fstat(int fd, SMB_STRUCT_STAT *sbuf,
diff --git a/source3/lib/system.c b/source3/lib/system.c
index d42ec3048cc..a67388e436a 100644
--- a/source3/lib/system.c
+++ b/source3/lib/system.c
@@ -349,6 +349,12 @@ void update_stat_ex_itime(struct stat_ex *dst,
 	dst->st_ex_iflags &= ~ST_EX_IFLAG_CALCULATED_ITIME;
 }
 
+void update_stat_ex_file_id(struct stat_ex *dst, uint64_t file_id)
+{
+	dst->st_ex_file_id = file_id;
+	dst->st_ex_iflags &= ~ST_EX_IFLAG_CALCULATED_FILE_ID;
+}
+
 void init_stat_ex_from_stat (struct stat_ex *dst,
 			    const struct stat *src,
 			    bool fake_dir_create_times)