diff --git a/src/clj/com/rpl/specter/defhelpers.clj b/src/clj/com/rpl/specter/defhelpers.clj
index f409b1e..31a4a39 100644
--- a/src/clj/com/rpl/specter/defhelpers.clj
+++ b/src/clj/com/rpl/specter/defhelpers.clj
@@ -3,13 +3,13 @@
 (defn gensyms [amt]
   (vec (repeatedly amt gensym)))
 
-(defmacro define-ParamsNeededPath [fn-type invoke-name var-arity-impl]
+(defmacro define-ParamsNeededPath [clj? fn-type invoke-name var-arity-impl]
   (let [a (with-meta (gensym "array") {:tag 'objects})
         impls (for [i (range 21)
                     :let [args (vec (gensyms i))
                           setters (for [j (range i)] `(aset ~a ~j ~(get args j)))]]
                 `(~invoke-name [this# ~@args]
-                  (let [~a (com.rpl.specter.impl/fast-object-array ~i)]
+                  (let [~a (~(if clj? 'com.rpl.specter.impl/fast-object-array 'object-array) ~i)]
                     ~@setters
                     (com.rpl.specter.impl/bind-params* this# ~a 0)
                     )))]
diff --git a/src/clj/com/rpl/specter/impl.cljx b/src/clj/com/rpl/specter/impl.cljx
index 98f52dd..d78627d 100644
--- a/src/clj/com/rpl/specter/impl.cljx
+++ b/src/clj/com/rpl/specter/impl.cljx
@@ -92,6 +92,7 @@
 
 #+clj
 (dh/define-ParamsNeededPath
+  true
   clojure.lang.IFn
   invoke
   (applyTo [this args]
@@ -100,6 +101,7 @@
 
 #+cljs
 (define-ParamsNeededPath
+  false
   cljs.core/IFn
   -invoke
   (-invoke [this p01 p02 p03 p04 p05 p06 p07 p08 p09 p10