diff --git a/fp/_baseConvert.js b/fp/_baseConvert.js
index 7af27655b..fcc28f26b 100644
--- a/fp/_baseConvert.js
+++ b/fp/_baseConvert.js
@@ -171,7 +171,9 @@ function baseConvert(util, name, func, options) {
     'curry': util.curry,
     'forEach': util.forEach,
     'isArray': util.isArray,
+    'isError': util.isError,
     'isFunction': util.isFunction,
+    'isWeakMap': util.isWeakMap,
     'iteratee': util.iteratee,
     'keys': util.keys,
     'rearg': util.rearg,
@@ -185,7 +187,9 @@ function baseConvert(util, name, func, options) {
       curry = helpers.curry,
       each = helpers.forEach,
       isArray = helpers.isArray,
+      isError = helpers.isError,
       isFunction = helpers.isFunction,
+      isWeakMap = helpers.isWeakMap,
       keys = helpers.keys,
       rearg = helpers.rearg,
       toInteger = helpers.toInteger,
@@ -355,8 +359,9 @@ function baseConvert(util, name, func, options) {
       var key = path[index],
           value = nested[key];
 
-      if (value != null) {
-        nested[path[index]] = clone(index == lastIndex ? value : Object(value));
+      if (value != null &&
+          !(isFunction(value) || isError(value) || isWeakMap(value))) {
+        nested[key] = clone(index == lastIndex ? value : Object(value));
       }
       nested = nested[key];
     }
diff --git a/lib/fp/template/modules/_util.jst b/lib/fp/template/modules/_util.jst
index 708446302..1dbf36f5d 100644
--- a/lib/fp/template/modules/_util.jst
+++ b/lib/fp/template/modules/_util.jst
@@ -5,7 +5,9 @@ module.exports = {
   'curry': require('../curry'),
   'forEach': require('../_arrayEach'),
   'isArray': require('../isArray'),
+  'isError': require('../isError'),
   'isFunction': require('../isFunction'),
+  'isWeakMap': require('../isWeakMap'),
   'iteratee': require('../iteratee'),
   'keys': require('../_baseKeys'),
   'rearg': require('../rearg'),
diff --git a/test/test-fp.js b/test/test-fp.js
index 46a4c87b1..dbc035258 100644
--- a/test/test-fp.js
+++ b/test/test-fp.js
@@ -2138,6 +2138,16 @@
       assert.strictEqual(typeof actual.a.b, 'number');
     });
 
+    QUnit.test('should not convert uncloneables to objects', function(assert) {
+      assert.expect(2);
+
+      var object = { 'a': { 'b': _.constant(true) } },
+          actual = fp.update('a.b')(_.identity)(object);
+
+      assert.strictEqual(typeof object.a.b, 'function')
+      assert.strictEqual(object.a.b, actual.a.b);
+    });
+
     QUnit.test('should not mutate values', function(assert) {
       assert.expect(2);