diff --git a/src/or/rendcache.c b/src/or/rendcache.c
index 8f3ddf5585..9be9e24941 100644
--- a/src/or/rendcache.c
+++ b/src/or/rendcache.c
@@ -129,6 +129,7 @@ rend_cache_failure_intro_entry_new(rend_intro_point_failure_t failure)
 {
   rend_cache_failure_intro_t *entry = tor_malloc(sizeof(*entry));
   entry->failure_type = failure;
+  entry->created_ts = time(NULL);
   return entry;
 }
 
diff --git a/src/or/rendcache.h b/src/or/rendcache.h
index b214a48ccc..98c0f95264 100644
--- a/src/or/rendcache.h
+++ b/src/or/rendcache.h
@@ -34,6 +34,9 @@ typedef struct rend_cache_entry_t {
 
 /* Introduction point failure type. */
 typedef struct rend_cache_failure_intro_t {
+  /* When this intro point failure occured thus we allocated this object and
+   * cache it. */
+  time_t created_ts;
   rend_intro_point_failure_t failure_type;
 } rend_cache_failure_intro_t;