diff --git a/modules/core/src/main/java/org/locationtech/jts/simplify/DouglasPeuckerLineSimplifier.java b/modules/core/src/main/java/org/locationtech/jts/simplify/DouglasPeuckerLineSimplifier.java
index d9a8ba04c9..e1121fa5a9 100644
--- a/modules/core/src/main/java/org/locationtech/jts/simplify/DouglasPeuckerLineSimplifier.java
+++ b/modules/core/src/main/java/org/locationtech/jts/simplify/DouglasPeuckerLineSimplifier.java
@@ -68,7 +68,7 @@ public Coordinate[] simplify()
     CoordinateList coordList = new CoordinateList();
     for (int i = 0; i < pts.length; i++) {
       if (usePt[i])
-        coordList.add(new Coordinate(pts[i]));
+        coordList.add(pts[i].copy());
     }
     
     if (! isPreserveEndpoint && CoordinateArrays.isRing(pts)) {