diff --git a/modules/reitit-core/src/reitit/interceptor.cljc b/modules/reitit-core/src/reitit/interceptor.cljc
index 3722888f..8f9cfd0c 100644
--- a/modules/reitit-core/src/reitit/interceptor.cljc
+++ b/modules/reitit-core/src/reitit/interceptor.cljc
@@ -1,5 +1,6 @@
 (ns reitit.interceptor
   (:require [meta-merge.core :refer [meta-merge]]
+            [clojure.pprint :as pprint]
             [reitit.core :as r]
             [reitit.impl :as impl]))
 
@@ -20,8 +21,15 @@
           (into-interceptor interceptor data opts))
         (throw
           (ex-info
-            (str "Interceptor " this " not found in registry.")
-            {:keyword this
+            (str
+              "Interceptor " this " not found in registry.\n\n"
+              (if (seq registry)
+                (str
+                  "Available interceptors in registry:\n"
+                  (with-out-str
+                    (pprint/print-table [:id :description] (for [[k v] registry] {:id k :description v}))))
+                "see [reitit.interceptor/router] on how to add interceptor to the registry.\n") "\n")
+            {:id this
              :registry registry}))))
 
   #?(:clj  clojure.lang.APersistentVector
diff --git a/modules/reitit-core/src/reitit/middleware.cljc b/modules/reitit-core/src/reitit/middleware.cljc
index fe0a8f80..f429aac1 100644
--- a/modules/reitit-core/src/reitit/middleware.cljc
+++ b/modules/reitit-core/src/reitit/middleware.cljc
@@ -29,7 +29,7 @@
                   (with-out-str
                     (pprint/print-table [:id :description] (for [[k v] registry] {:id k :description v}))))
                 "see [reitit.middleware/router] on how to add middleware to the registry.\n") "\n")
-            {:keyword this
+            {:id this
              :registry registry}))))
 
   #?(:clj  clojure.lang.APersistentVector