diff --git a/MyTracks/src/com/google/android/apps/mytracks/ChartView.java b/MyTracks/src/com/google/android/apps/mytracks/ChartView.java
index c1bbfbfac..5e50b2fa0 100644
--- a/MyTracks/src/com/google/android/apps/mytracks/ChartView.java
+++ b/MyTracks/src/com/google/android/apps/mytracks/ChartView.java
@@ -728,7 +728,7 @@ public class ChartView extends View {
       }
     }
     float density = getContext().getResources().getDisplayMetrics().density;
-    // TODO: This should be function of the number of variables displayed.
+    maxLength = Math.max(maxLength, 1);
     leftBorder = (int) (density * (4 + 8 * maxLength));
     effectiveWidth = w - leftBorder - RIGHT_BORDER;
     bottomBorder = (int) (density * BOTTOM_BORDER);