diff --git a/src/main/java/org/apache/commons/math4/random/AbstractWell.java b/src/main/java/org/apache/commons/math4/random/AbstractWell.java
index b2d61a389..a389d5888 100644
--- a/src/main/java/org/apache/commons/math4/random/AbstractWell.java
+++ b/src/main/java/org/apache/commons/math4/random/AbstractWell.java
@@ -38,7 +38,7 @@ public abstract class AbstractWell
     extends BaseRandomGenerator
     implements Serializable {
     /** Serializable version identifier. */
-    private static final long serialVersionUID = 20151228L;
+    private static final long serialVersionUID = 20150228L;
     /** Current index in the bytes pool. */
     protected int index;
     /** Bytes pool. */