diff --git a/modules/core/src/main/java/org/locationtech/jts/operation/overlayng/OverlayEdge.java b/modules/core/src/main/java/org/locationtech/jts/operation/overlayng/OverlayEdge.java
index 972ffd9f08..eb932fba40 100644
--- a/modules/core/src/main/java/org/locationtech/jts/operation/overlayng/OverlayEdge.java
+++ b/modules/core/src/main/java/org/locationtech/jts/operation/overlayng/OverlayEdge.java
@@ -147,7 +147,7 @@ public Coordinate[] getCoordinatesOriented() {
    */
   public void addCoordinates(CoordinateList coords)
   {
-    boolean isFirstEdge = coords.size() > 0;
+    boolean isFirstEdge = coords.isEmpty();
     if (direction) {
       int startIndex = 1;
       if (isFirstEdge) startIndex = 0;