diff --git a/commons-numbers-core/src/main/java/org/apache/commons/numbers/core/Sum.java b/commons-numbers-core/src/main/java/org/apache/commons/numbers/core/Sum.java
index eaee0d9b2..377cc3f81 100644
--- a/commons-numbers-core/src/main/java/org/apache/commons/numbers/core/Sum.java
+++ b/commons-numbers-core/src/main/java/org/apache/commons/numbers/core/Sum.java
@@ -184,6 +184,7 @@ public Sum add(final Sum other) {
      *
      * @param other Sum to subtract.
      * @return this instance.
+     * @since 1.2
      */
     public Sum subtract(final Sum other) {
         return add(-other.sum, -other.comp);
diff --git a/commons-numbers-field/src/main/java/org/apache/commons/numbers/field/DDField.java b/commons-numbers-field/src/main/java/org/apache/commons/numbers/field/DDField.java
index 4a6a7550f..080ab26e3 100644
--- a/commons-numbers-field/src/main/java/org/apache/commons/numbers/field/DDField.java
+++ b/commons-numbers-field/src/main/java/org/apache/commons/numbers/field/DDField.java
@@ -20,6 +20,8 @@
 
 /**
  * {@link DD} field.
+ *
+ * @since 1.2
  */
 public final class DDField extends AbstractField<DD> {
     /** Singleton. */