diff --git a/src/traces/parcoords/calc.js b/src/traces/parcoords/calc.js
index 82ca943103c..4f77081877a 100644
--- a/src/traces/parcoords/calc.js
+++ b/src/traces/parcoords/calc.js
@@ -14,7 +14,13 @@ var Lib = require('../../lib');
 var wrap = require('../../lib/gup').wrap;
 
 module.exports = function calc(gd, trace) {
-    var cs = !!trace.line.colorscale && Lib.isArrayOrTypedArray(trace.line.color);
+
+    for(var i = 0; i < trace.dimensions.length; i++) {
+        trace.dimensions[i].values = convertTypedArray(trace.dimensions[i].values);
+    }
+    trace.line.color = convertTypedArray(trace.line.color);
+
+    var cs = !!trace.line.colorscale && Array.isArray(trace.line.color);
     var color = cs ? trace.line.color : constHalf(trace._length);
     var cscale = cs ? trace.line.colorscale : [[0, trace.line.color], [1, trace.line.color]];
 
@@ -39,3 +45,7 @@ function constHalf(len) {
     }
     return out;
 }
+
+function convertTypedArray(a) {
+    return (Lib.isTypedArray(a)) ? Array.prototype.slice.call(a) : a;
+}
diff --git a/test/jasmine/tests/parcoords_test.js b/test/jasmine/tests/parcoords_test.js
index 2b42b71983b..863fcd1a531 100644
--- a/test/jasmine/tests/parcoords_test.js
+++ b/test/jasmine/tests/parcoords_test.js
@@ -326,6 +326,30 @@ describe('parcoords initialization tests', function() {
                 color: '#444'
             });
         });
+
+        it('\'dimensions.values\' and \'line.color\' should convert typed arrays to normal arrays', function() {
+            var fullTrace = _calc(Lib.extendDeep({}, base, {
+                dimensions: [{
+                    range: [1, 5],
+                    label: 'A',
+                    values: [1, 4, 3]
+                }, {
+                    range: [1, 5],
+                    label: 'B',
+                    values: new Float64Array([3, 1.5, 2]),
+                }, {
+                    range: [1, 5],
+                    label: 'C',
+                    values: new Int32Array([2, 4, 1]),
+                }],
+                line: {
+                    color: new Int32Array([0, 1, 2])
+                }
+            }));
+            expect(Array.isArray(fullTrace.line.color) === true).toEqual(true);
+            expect(Array.isArray(fullTrace.dimensions[1].values) === true).toEqual(true);
+            expect(Array.isArray(fullTrace.dimensions[2].values) === true).toEqual(true);
+        });
     });
 });