diff --git a/src/or/dirserv.c b/src/or/dirserv.c
index 6190720a9f..a4b9abf694 100644
--- a/src/or/dirserv.c
+++ b/src/or/dirserv.c
@@ -1033,7 +1033,7 @@ static cached_dir_t the_v2_networkstatus = { NULL, NULL, 0, 0, 0 };
 static int
 generate_v2_networkstatus(void)
 {
-#define BASE64_DIGEST_LEN 29
+#define BASE64_DIGEST_LEN 27
 #define LONGEST_STATUS_FLAG_NAME_LEN 7
 #define N_STATUS_FLAGS 6
 #define RS_ENTRY_LEN                                                    \