diff --git a/streams/src/main/java/org/apache/kafka/streams/kstream/KStream.java b/streams/src/main/java/org/apache/kafka/streams/kstream/KStream.java
index a0017f4b7d20d..fdbf1404dff94 100644
--- a/streams/src/main/java/org/apache/kafka/streams/kstream/KStream.java
+++ b/streams/src/main/java/org/apache/kafka/streams/kstream/KStream.java
@@ -2782,8 +2782,6 @@ <K1, V1> KStream<K1, V1> flatTransform(final TransformerSupplier<? super K, ? su
      * To trigger periodic actions via {@link org.apache.kafka.streams.processor.Punctuator#punctuate(long) punctuate()},
      * a schedule must be registered.
      * The {@link ValueTransformer} must return the new value in {@link ValueTransformer#transform(Object) transform()}.
-     * If the return value of {@link ValueTransformer#transform(Object) ValueTransformer#transform()} is {@code null},
-     * no records are emitted.
      * In contrast to {@link #transform(TransformerSupplier, String...) transform()}, no additional {@link KeyValue}
      * pairs can be emitted via {@link ProcessorContext#forward(Object, Object) ProcessorContext.forward()}.
      * A {@link org.apache.kafka.streams.errors.StreamsException} is thrown if the {@link ValueTransformer} tries to
@@ -2860,8 +2858,6 @@ <VR> KStream<K, VR> transformValues(final ValueTransformerSupplier<? super V, ?
      * To trigger periodic actions via {@link org.apache.kafka.streams.processor.Punctuator#punctuate(long) punctuate()},
      * a schedule must be registered.
      * The {@link ValueTransformer} must return the new value in {@link ValueTransformer#transform(Object) transform()}.
-     * If the return value of {@link ValueTransformer#transform(Object) ValueTransformer#transform()} is {@code null}, no
-     * records are emitted.
      * In contrast to {@link #transform(TransformerSupplier, String...) transform()}, no additional {@link KeyValue}
      * pairs can be emitted via {@link ProcessorContext#forward(Object, Object) ProcessorContext.forward()}.
      * A {@link org.apache.kafka.streams.errors.StreamsException} is thrown if the {@link ValueTransformer} tries to
@@ -2942,8 +2938,6 @@ <VR> KStream<K, VR> transformValues(final ValueTransformerSupplier<? super V, ?
      * a schedule must be registered.
      * The {@link ValueTransformerWithKey} must return the new value in
      * {@link ValueTransformerWithKey#transform(Object, Object) transform()}.
-     * If the return value of {@link ValueTransformerWithKey#transform(Object, Object) ValueTransformerWithKey#transform()}
-     * is {@code null}, no records are emitted.
      * In contrast to {@link #transform(TransformerSupplier, String...) transform()} and
      * {@link #flatTransform(TransformerSupplier, String...) flatTransform()}, no additional {@link KeyValue} pairs
      * can be emitted via {@link ProcessorContext#forward(Object, Object) ProcessorContext.forward()}.
@@ -3024,8 +3018,6 @@ <VR> KStream<K, VR> transformValues(final ValueTransformerWithKeySupplier<? supe
      * a schedule must be registered.
      * The {@link ValueTransformerWithKey} must return the new value in
      * {@link ValueTransformerWithKey#transform(Object, Object) transform()}.
-     * If the return value of {@link ValueTransformerWithKey#transform(Object, Object) ValueTransformerWithKey#transform()}
-     * is {@code null}, no records are emitted.
      * In contrast to {@link #transform(TransformerSupplier, String...) transform()} and
      * {@link #flatTransform(TransformerSupplier, String...) flatTransform()}, no additional {@link KeyValue} pairs
      * can be emitted via {@link ProcessorContext#forward(Object, Object) ProcessorContext.forward()}.