diff --git a/uk/ac/sanger/artemis/circular/Graph.java b/uk/ac/sanger/artemis/circular/Graph.java
index 75b66c36466af31a7420b83556eb753d7753757e..5e3c39d694462b8461886357e5d118d545cd5671 100644
--- a/uk/ac/sanger/artemis/circular/Graph.java
+++ b/uk/ac/sanger/artemis/circular/Graph.java
@@ -134,7 +134,8 @@ public abstract class Graph extends JPanel
       g2.setTransform(newOrig);
       
       float xA = value_array[i];
-       
+      if(xA == 0.f)
+        continue;
       if(value_array[i] >= gcAverage)
         g2.setColor(getPlusColour());
       else