diff --git a/src/main/java/org/apache/commons/collections4/functors/TransformerPredicate.java b/src/main/java/org/apache/commons/collections4/functors/TransformerPredicate.java
index 6aef85148..80d61934b 100644
--- a/src/main/java/org/apache/commons/collections4/functors/TransformerPredicate.java
+++ b/src/main/java/org/apache/commons/collections4/functors/TransformerPredicate.java
@@ -26,6 +26,7 @@ import org.apache.commons.collections4.Transformer;
 /**
  * Predicate implementation that returns the result of a transformer.
  *
+ * @param <T> the type of the input to the predicate.
  * @since 3.0
  */
 public final class TransformerPredicate<T> implements Predicate<T>, Serializable {
diff --git a/src/main/java/org/apache/commons/collections4/functors/TruePredicate.java b/src/main/java/org/apache/commons/collections4/functors/TruePredicate.java
index e09865371..a17d319b2 100644
--- a/src/main/java/org/apache/commons/collections4/functors/TruePredicate.java
+++ b/src/main/java/org/apache/commons/collections4/functors/TruePredicate.java
@@ -23,6 +23,7 @@ import org.apache.commons.collections4.Predicate;
 /**
  * Predicate implementation that always returns true.
  *
+ * @param <T> the type of the input to the predicate.
  * @since 3.0
  */
 public final class TruePredicate<T> implements Predicate<T>, Serializable {