diff --git a/src/scales/scale.time.js b/src/scales/scale.time.js
index a2892bfd6cd..099e5717e9a 100644
--- a/src/scales/scale.time.js
+++ b/src/scales/scale.time.js
@@ -554,7 +554,9 @@ module.exports = function() {
 							datasets[i][j] = timestamp;
 						}
 					} else {
-						timestamps.push.apply(timestamps, labels);
+						for (j = 0, jlen = labels.length; j < jlen; ++j) {
+							timestamps.push(labels[j]);
+						}
 						datasets[i] = labels.slice(0);
 					}
 				} else {