diff --git a/src/com/lushprojects/circuitjs1/client/AndGateElm.java b/src/com/lushprojects/circuitjs1/client/AndGateElm.java
index dc199167..5cbc609a 100644
--- a/src/com/lushprojects/circuitjs1/client/AndGateElm.java
+++ b/src/com/lushprojects/circuitjs1/client/AndGateElm.java
@@ -31,7 +31,7 @@ public AndGateElm(int xa, int ya, int xb, int yb, int f,
 	String getGateText() { return "&"; }
 	
 	public final native void ellipse(Context2d g, double x, double y, double rx, double ry, double ro, double sa, double ea, boolean ccw) /*-{
-	    g.ellipse(x, y, rx, ry, ro, sa, ea, ccw);
+	    if (rx >= 0 && ry >= 0) g.ellipse(x, y, rx, ry, ro, sa, ea, ccw);
 	}-*/;
 
 	void drawGatePolygon(Graphics g) {