diff --git a/src/or/control.c b/src/or/control.c
index 950e9891e0..8ef3c5c8ee 100644
--- a/src/or/control.c
+++ b/src/or/control.c
@@ -1740,7 +1740,7 @@ getinfo_helper_dir(control_connection_t *control_conn,
       return -1;
     }
 
-    if (rend_cache_lookup_entry(question, -1, &e) > 0) {
+    if (!rend_cache_lookup_entry(question, -1, &e)) {
       /* Descriptor found in cache */
       *answer = tor_strdup(e->desc);
     } else {