diff --git a/org.knime.knip.core/src/org/knime/knip/core/ui/imgviewer/overlay/elemens/PointOverlayElement.java b/org.knime.knip.core/src/org/knime/knip/core/ui/imgviewer/overlay/elemens/PointOverlayElement.java
index 0397f691..e91121d1 100644
--- a/org.knime.knip.core/src/org/knime/knip/core/ui/imgviewer/overlay/elemens/PointOverlayElement.java
+++ b/org.knime.knip.core/src/org/knime/knip/core/ui/imgviewer/overlay/elemens/PointOverlayElement.java
@@ -70,6 +70,8 @@
  */
 public class PointOverlayElement extends OverlayElement2D {
 
+    public static final long serialVersionUID = -3686435965417501903l;
+
     private static final int DRAWING_RADIUS = 4;
 
     private int m_y;
diff --git a/org.knime.knip.core/src/org/knime/knip/core/ui/imgviewer/overlay/elements/PointOverlayElement.java b/org.knime.knip.core/src/org/knime/knip/core/ui/imgviewer/overlay/elements/PointOverlayElement.java
index 6eece5d8..8ce2ffb2 100644
--- a/org.knime.knip.core/src/org/knime/knip/core/ui/imgviewer/overlay/elements/PointOverlayElement.java
+++ b/org.knime.knip.core/src/org/knime/knip/core/ui/imgviewer/overlay/elements/PointOverlayElement.java
@@ -69,6 +69,8 @@
  */
 public class PointOverlayElement extends OverlayElement2D {
 
+    public static final long serialVersionUID = -3686435965417501903l;
+
     private static final int DRAWING_RADIUS = 4;
 
     private int m_y;