diff --git a/src/traces/contour/contours_defaults.js b/src/traces/contour/contours_defaults.js
new file mode 100644
index 00000000000..0a59f435cae
--- /dev/null
+++ b/src/traces/contour/contours_defaults.js
@@ -0,0 +1,30 @@
+/**
+* Copyright 2012-2017, Plotly, Inc.
+* All rights reserved.
+*
+* This source code is licensed under the MIT license found in the
+* LICENSE file in the root directory of this source tree.
+*/
+
+'use strict';
+
+var Lib = require('../../lib');
+var attributes = require('./attributes');
+
+module.exports = function handleContourDefaults(traceIn, traceOut, coerce) {
+    var contourStart = Lib.coerce2(traceIn, traceOut, attributes, 'contours.start');
+    var contourEnd = Lib.coerce2(traceIn, traceOut, attributes, 'contours.end');
+    var missingEnd = (contourStart === false) || (contourEnd === false);
+
+    // normally we only need size if autocontour is off. But contour.calc
+    // pushes its calculated contour size back to the input trace, so for
+    // things like restyle that can call supplyDefaults without calc
+    // after the initial draw, we can just reuse the previous calculation
+    var contourSize = coerce('contours.size');
+    var autoContour;
+
+    if(missingEnd) autoContour = traceOut.autocontour = true;
+    else autoContour = coerce('autocontour', false);
+
+    if(autoContour || !contourSize) coerce('ncontours');
+};
diff --git a/src/traces/contour/defaults.js b/src/traces/contour/defaults.js
index 04b9debba70..a616f818045 100644
--- a/src/traces/contour/defaults.js
+++ b/src/traces/contour/defaults.js
@@ -13,7 +13,8 @@ var Lib = require('../../lib');
 
 var hasColumns = require('../heatmap/has_columns');
 var handleXYZDefaults = require('../heatmap/xyz_defaults');
-var handleStyleDefaults = require('../contour/style_defaults');
+var handleContoursDefaults = require('./contours_defaults');
+var handleStyleDefaults = require('./style_defaults');
 var attributes = require('./attributes');
 
 
@@ -31,21 +32,6 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     coerce('text');
     coerce('connectgaps', hasColumns(traceOut));
 
-    var contourStart = Lib.coerce2(traceIn, traceOut, attributes, 'contours.start'),
-        contourEnd = Lib.coerce2(traceIn, traceOut, attributes, 'contours.end'),
-        missingEnd = (contourStart === false) || (contourEnd === false),
-
-        // normally we only need size if autocontour is off. But contour.calc
-        // pushes its calculated contour size back to the input trace, so for
-        // things like restyle that can call supplyDefaults without calc
-        // after the initial draw, we can just reuse the previous calculation
-        contourSize = coerce('contours.size'),
-        autoContour;
-
-    if(missingEnd) autoContour = traceOut.autocontour = true;
-    else autoContour = coerce('autocontour', false);
-
-    if(autoContour || !contourSize) coerce('ncontours');
-
+    handleContoursDefaults(traceIn, traceOut, coerce);
     handleStyleDefaults(traceIn, traceOut, coerce, layout);
 };
diff --git a/src/traces/histogram2dcontour/defaults.js b/src/traces/histogram2dcontour/defaults.js
index 21a2dbc0755..b0a9f937559 100644
--- a/src/traces/histogram2dcontour/defaults.js
+++ b/src/traces/histogram2dcontour/defaults.js
@@ -12,6 +12,7 @@
 var Lib = require('../../lib');
 
 var handleSampleDefaults = require('../histogram2d/sample_defaults');
+var handleContoursDefaults = require('../contour/contours_defaults');
 var handleStyleDefaults = require('../contour/style_defaults');
 var attributes = require('./attributes');
 
@@ -22,13 +23,6 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     }
 
     handleSampleDefaults(traceIn, traceOut, coerce, layout);
-
-    var contourStart = Lib.coerce2(traceIn, traceOut, attributes, 'contours.start'),
-        contourEnd = Lib.coerce2(traceIn, traceOut, attributes, 'contours.end'),
-        autocontour = coerce('autocontour', !(contourStart && contourEnd));
-
-    if(autocontour) coerce('ncontours');
-    else coerce('contours.size');
-
+    handleContoursDefaults(traceIn, traceOut, coerce);
     handleStyleDefaults(traceIn, traceOut, coerce, layout);
 };
diff --git a/test/jasmine/tests/histogram2d_test.js b/test/jasmine/tests/histogram2d_test.js
index e6e421fad84..e9d43fac05b 100644
--- a/test/jasmine/tests/histogram2d_test.js
+++ b/test/jasmine/tests/histogram2d_test.js
@@ -1,9 +1,13 @@
+var Plotly = require('@lib/index');
 var Plots = require('@src/plots/plots');
 var Lib = require('@src/lib');
 
 var supplyDefaults = require('@src/traces/histogram2d/defaults');
 var calc = require('@src/traces/histogram2d/calc');
 
+var createGraphDiv = require('../assets/create_graph_div');
+var destroyGraphDiv = require('../assets/destroy_graph_div');
+var fail = require('../assets/fail_test');
 
 describe('Test histogram2d', function() {
     'use strict';
@@ -132,4 +136,26 @@ describe('Test histogram2d', function() {
             ]);
         });
     });
+
+    describe('relayout interaction', function() {
+
+        afterEach(destroyGraphDiv);
+
+        it('should update paths on zooms', function(done) {
+            var gd = createGraphDiv();
+
+            Plotly.newPlot(gd, [{
+                type: 'histogram2dcontour',
+                x: [1, 1, 2, 2, 3],
+                y: [0, 1, 1, 1, 3]
+            }])
+            .then(function() {
+                return Plotly.relayout(gd, 'xaxis.range', [0, 2]);
+            })
+            .catch(fail)
+            .then(done);
+        });
+
+    });
+
 });