diff --git a/src/or/geoip.c b/src/or/geoip.c
index 0ff1c6ce0d..572bba577f 100644
--- a/src/or/geoip.c
+++ b/src/or/geoip.c
@@ -1881,5 +1881,8 @@ geoip_free_all(void)
 
   clear_geoip_db();
   tor_free(bridge_stats_extrainfo);
+
+  memset(geoip_digest, 0, sizeof(geoip_digest));
+  memset(geoip6_digest, 0, sizeof(geoip6_digest));
 }