diff --git a/src/partial.lenses.js b/src/partial.lenses.js
index 670734c6..e687f5ef 100644
--- a/src/partial.lenses.js
+++ b/src/partial.lenses.js
@@ -249,7 +249,7 @@ const lensFrom = (get, set) => i => (x, _i, F, xi2yF) =>
 
 //
 
-const getProp = (k, o) => o instanceof Object ? o[k] : void 0
+const getProp = (k, o) => null != o ? o[k] : void 0
 
 const setProp = /*#__PURE__*/(process.env.NODE_ENV === "production" ? I.id : C.res(I.freeze))((k, v, o) =>
   void 0 !== v ? I.assocPartialU(k, v, o) : I.dissocPartialU(k, o) || I.object0)
@@ -646,8 +646,7 @@ const pickInAux = (t, k) => [k, pickIn(t)]
 // Auxiliary
 
 export const seemsArrayLike = x =>
-  x instanceof Object && (x = x.length, x === (x >> 0) && 0 <= x) ||
-  I.isString(x)
+  null != x && (x = x.length, x === (x >> 0) && 0 <= x)
 
 // Internals