diff --git a/src/core/core.helpers.js b/src/core/core.helpers.js
index 08fc3a419..470bc0d9c 100644
--- a/src/core/core.helpers.js
+++ b/src/core/core.helpers.js
@@ -844,4 +844,15 @@
 		isDatasetVisible = helpers.isDatasetVisible = function(dataset) {
 			return !dataset.hidden;
 		};
+        pushAllIfDefined = helpers.pushAllIfDefined = function(element, array) {
+            if (typeof element == "undefined") {
+                return;
+            }
+            
+            if (isArray(element)) {
+                array.push.apply(array, element);
+            } else {
+                array.push(element);
+            }
+		};
 }).call(this);
diff --git a/src/core/core.tooltip.js b/src/core/core.tooltip.js
index 2ce84a91d..8ae52854e 100644
--- a/src/core/core.tooltip.js
+++ b/src/core/core.tooltip.js
@@ -162,11 +162,9 @@
 			var lines = [];
 
 			helpers.each(tooltipItems, function(bodyItem) {
-				var beforeLabel = this._options.tooltips.callbacks.beforeLabel.call(this, bodyItem, data) || '';
-				var bodyLabel = this._options.tooltips.callbacks.label.call(this, bodyItem, data) || '';
-				var afterLabel = this._options.tooltips.callbacks.afterLabel.call(this, bodyItem, data) || '';
-
-				lines.push(beforeLabel + bodyLabel + afterLabel);
+                helpers.pushAllIfDefined(this._options.tooltips.callbacks.beforeLabel.call(this, bodyItem, data), lines);
+                helpers.pushAllIfDefined(this._options.tooltips.callbacks.label.call(this, bodyItem, data), lines);
+                helpers.pushAllIfDefined(this._options.tooltips.callbacks.afterLabel.call(this, bodyItem, data), lines);
 			}, this);
 
 			return lines;