diff --git a/build.gradle b/build.gradle
index e10bf526c7..17ccd116ac 100644
--- a/build.gradle
+++ b/build.gradle
@@ -273,6 +273,8 @@ project('reactor-core') {
 
 	//TODO after a release, bump the gradle.properties baseline
 	//TODO after a release, remove the reactor-core exclusions below if any
+	//gh-1036
+	classExcludes = ['reactor.core.publisher.FluxIndex', 'reactor.core.publisher.FluxIndexFuseable', 'reactor.core.publisher.FluxDelaySequence']
   }
 
   javadoc {
diff --git a/reactor-core/src/main/java/reactor/core/publisher/FluxDelaySequence.java b/reactor-core/src/main/java/reactor/core/publisher/FluxDelaySequence.java
index 80627234fe..aa1407fb8a 100644
--- a/reactor-core/src/main/java/reactor/core/publisher/FluxDelaySequence.java
+++ b/reactor-core/src/main/java/reactor/core/publisher/FluxDelaySequence.java
@@ -28,12 +28,12 @@
  * @author Simon Baslé
  */
 //adapted from RxJava2 FlowableDelay: https://github.com/ReactiveX/RxJava/blob/2.x/src/main/java/io/reactivex/internal/operators/flowable/FlowableDelay.java
-public final class FluxDelaySequence<T> extends FluxOperator<T, T> {
+final class FluxDelaySequence<T> extends FluxOperator<T, T> {
 
 	final Duration  delay;
 	final Scheduler scheduler;
 
-	public FluxDelaySequence(Flux<T> source, Duration delay, Scheduler scheduler) {
+	FluxDelaySequence(Flux<T> source, Duration delay, Scheduler scheduler) {
 		super(source);
 		this.delay = delay;
 		this.scheduler = scheduler;
diff --git a/reactor-core/src/main/java/reactor/core/publisher/FluxIndex.java b/reactor-core/src/main/java/reactor/core/publisher/FluxIndex.java
index e0c8920c16..2289eca41e 100644
--- a/reactor-core/src/main/java/reactor/core/publisher/FluxIndex.java
+++ b/reactor-core/src/main/java/reactor/core/publisher/FluxIndex.java
@@ -34,7 +34,7 @@
  *
  * @author Simon Baslé
  */
-public class FluxIndex<T, I> extends FluxOperator<T, I> {
+final class FluxIndex<T, I> extends FluxOperator<T, I> {
 
 	private final BiFunction<? super Long, ? super T, ? extends I> indexMapper;
 
diff --git a/reactor-core/src/main/java/reactor/core/publisher/FluxIndexFuseable.java b/reactor-core/src/main/java/reactor/core/publisher/FluxIndexFuseable.java
index e823e020fa..73e49c2488 100644
--- a/reactor-core/src/main/java/reactor/core/publisher/FluxIndexFuseable.java
+++ b/reactor-core/src/main/java/reactor/core/publisher/FluxIndexFuseable.java
@@ -51,7 +51,7 @@
  *
  * @author Simon Baslé
  */
-public class FluxIndexFuseable<T, I> extends FluxOperator<T, I>
+final class FluxIndexFuseable<T, I> extends FluxOperator<T, I>
 		implements Fuseable {
 
 	private final BiFunction<? super Long, ? super T, ? extends I> indexMapper;