diff --git a/src/ol/geom/flat/interpolateflatgeom.js b/src/ol/geom/flat/interpolateflatgeom.js
index dcfb16e2cb..9d24deb9da 100644
--- a/src/ol/geom/flat/interpolateflatgeom.js
+++ b/src/ol/geom/flat/interpolateflatgeom.js
@@ -61,7 +61,8 @@ ol.geom.flat.interpolate.lineString =
     }
   }
   if (goog.isDefAndNotNull(opt_dest)) {
-    opt_dest.push(pointX, pointY);
+    opt_dest[0] = pointX;
+    opt_dest[1] = pointY;
     return opt_dest;
   } else {
     return [pointX, pointY];
diff --git a/test/spec/ol/geom/flat/interpolateflatgeom.test.js b/test/spec/ol/geom/flat/interpolateflatgeom.test.js
index 13cdf9f0ca..a9b205bc04 100644
--- a/test/spec/ol/geom/flat/interpolateflatgeom.test.js
+++ b/test/spec/ol/geom/flat/interpolateflatgeom.test.js
@@ -42,6 +42,14 @@ describe('ol.geom.flat.interpolate', function() {
           expect(point).to.eql([3, 4]);
         });
 
+    it('returns the expected value when using opt_dest',
+        function() {
+          var flatCoordinates = [0, 1, 2, 3, 6, 7];
+          var point = ol.geom.flat.interpolate.lineString(
+              flatCoordinates, 0, 6, 2, 0.5, [0, 0]);
+          expect(point).to.eql([3, 4]);
+        });
+
   });
 
 });