diff --git a/modules/reitit-ring/src/reitit/ring.cljc b/modules/reitit-ring/src/reitit/ring.cljc
index 3585caf8..c408d891 100644
--- a/modules/reitit-ring/src/reitit/ring.cljc
+++ b/modules/reitit-ring/src/reitit/ring.cljc
@@ -100,7 +100,9 @@
                       ::default-options-endpoint default-options-endpoint}
                      opts)]
      (assert (not (contains? opts ::default-options-handler))
-             "Option `::default-options-handler` is deprecated. Use `::default-options-endpoint` instead.")
+             (str
+              "Option `:reitit.ring/default-options-handler` is deprecated."
+              " Use `:reitit.ring/default-options-endpoint` instead."))
      (r/router data opts))))
 
 (defn routes
diff --git a/test/cljc/reitit/ring_test.cljc b/test/cljc/reitit/ring_test.cljc
index 4a5ecbb4..cdb919f9 100644
--- a/test/cljc/reitit/ring_test.cljc
+++ b/test/cljc/reitit/ring_test.cljc
@@ -205,6 +205,10 @@
             (is (= 405 (:status (app {:request-method :post, :uri "/ping"}))))))))))
 
 (deftest default-options-handler-test
+  (testing "Assertion fails when using deprecated options-handler"
+    (is (thrown? java.lang.AssertionError (ring/router [] {::ring/default-options-handler (fn [_] )})))))
+
+(deftest default-options-endpoint-test
   (let [response {:status 200, :body "ok"}]
 
     (testing "with defaults"