diff --git a/gui/src/org/pzgui/icon/ShapeIcon.java b/gui/src/org/pzgui/icon/ShapeIcon.java
index ddf8319..aebf51b 100644
--- a/gui/src/org/pzgui/icon/ShapeIcon.java
+++ b/gui/src/org/pzgui/icon/ShapeIcon.java
@@ -70,8 +70,10 @@ public static void draw( Graphics2D gfx, Shape s, Paint fill, Paint outline, int
         int yC = y - s.getBounds().height / 2;
         gfx.translate(xC, yC);
         
-        gfx.setPaint(fill);
-        gfx.fill(s);
+        if(fill != null) {
+            gfx.setPaint(fill);
+            gfx.fill(s);
+        }
         
         if( outline != null ) {
             gfx.setPaint(outline);