diff --git a/modules/reitit-core/src/reitit/impl.cljc b/modules/reitit-core/src/reitit/impl.cljc
index 9df30456..9795cf11 100644
--- a/modules/reitit-core/src/reitit/impl.cljc
+++ b/modules/reitit-core/src/reitit/impl.cljc
@@ -166,7 +166,7 @@
   (some-> s
           #?(:clj  (URLEncoder/encode "UTF-8")
              :cljs (js/encodeURIComponent))
-          (.replace "+" "%20")))
+          #?(:clj (.replace "+" "%20"))))
 
 (defn url-decode [s]
   (some-> s #?(:clj  (URLDecoder/decode "UTF-8")
@@ -201,9 +201,8 @@
 (defn path-params
   "shallow transform of the path-param values into strings"
   [params]
-  (persistent!
-    (reduce-kv
-      (fn [m k v]
-        (assoc! m k (url-encode (into-string v))))
-      (transient {})
-      params)))
+  (reduce-kv
+    (fn [m k v]
+      (assoc m k (url-encode (into-string v))))
+    {}
+    params))