diff --git a/ChartsDemo/Classes/DemoBaseViewController.m b/ChartsDemo/Classes/DemoBaseViewController.m
index 14191024e5..db0be337f7 100644
--- a/ChartsDemo/Classes/DemoBaseViewController.m
+++ b/ChartsDemo/Classes/DemoBaseViewController.m
@@ -148,9 +148,12 @@ - (void)handleOption:(NSString *)key forChartView:(ChartViewBase *)chartView
     
     if ([key isEqualToString:@"toggleBarBorders"])
     {
-        for (id<IBarChartDataSet> set in chartView.data.dataSets)
+        for (id<IBarChartDataSet, NSObject> set in chartView.data.dataSets)
         {
-            set.barBorderWidth = set.barBorderWidth == 1.0 ? 0.0 : 1.0;
+            if ([set conformsToProtocol:@protocol(IBarChartDataSet)])
+            {
+                set.barBorderWidth = set.barBorderWidth == 1.0 ? 0.0 : 1.0;
+            }
         }
         
         [chartView setNeedsDisplay];