diff --git a/src/reagent/impl/component.cljs b/src/reagent/impl/component.cljs
index b4bcf18..bfae327 100644
--- a/src/reagent/impl/component.cljs
+++ b/src/reagent/impl/component.cljs
@@ -58,11 +58,11 @@
 
 (defn ^boolean reagent-class? [c]
   (and (fn? c)
-       (some? (some-> c .-prototype (.-reagentRender)))))
+       (some? (some-> c (.-prototype) (.-reagentRender)))))
 
 (defn ^boolean react-class? [c]
   (and (fn? c)
-       (some? (some-> c .-prototype (.-render)))))
+       (some? (some-> c (.-prototype) (.-render)))))
 
 (defn ^boolean reagent-component? [c]
   (some? (.-reagentRender c)))