diff --git a/spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/ReactiveHealthContributorRegistryReactiveHealthIndicatorRegistryAdapter.java b/spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/ReactiveHealthContributorRegistryReactiveHealthIndicatorRegistryAdapter.java
index 5b1cdce8d8..863edd6aea 100644
--- a/spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/ReactiveHealthContributorRegistryReactiveHealthIndicatorRegistryAdapter.java
+++ b/spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/ReactiveHealthContributorRegistryReactiveHealthIndicatorRegistryAdapter.java
@@ -19,8 +19,6 @@ package org.springframework.boot.actuate.autoconfigure.health;
 import java.util.LinkedHashMap;
 import java.util.Map;
 
-import org.springframework.boot.actuate.health.HealthContributorRegistry;
-import org.springframework.boot.actuate.health.HealthIndicatorRegistry;
 import org.springframework.boot.actuate.health.NamedContributor;
 import org.springframework.boot.actuate.health.ReactiveHealthContributor;
 import org.springframework.boot.actuate.health.ReactiveHealthContributorRegistry;
@@ -29,8 +27,8 @@ import org.springframework.boot.actuate.health.ReactiveHealthIndicatorRegistry;
 import org.springframework.util.Assert;
 
 /**
- * Adapter class to convert a {@link HealthContributorRegistry} to a legacy
- * {@link HealthIndicatorRegistry}.
+ * Adapter class to convert a {@link ReactiveHealthContributorRegistry} to a legacy
+ * {@link ReactiveHealthIndicatorRegistry}.
  *
  * @author Phillip Webb
  */
diff --git a/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/NamedContributorsMapAdapter.java b/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/NamedContributorsMapAdapter.java
index 82ffcd46b5..4645ad047b 100644
--- a/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/NamedContributorsMapAdapter.java
+++ b/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/health/NamedContributorsMapAdapter.java
@@ -36,9 +36,9 @@ import org.springframework.util.Assert;
  */
 abstract class NamedContributorsMapAdapter<V, C> implements NamedContributors<C> {
 
-	private Map<String, V> map;
+	private final Map<String, V> map;
 
-	private Function<V, ? extends C> valueAdapter;
+	private final Function<V, ? extends C> valueAdapter;
 
 	NamedContributorsMapAdapter(Map<String, V> map, Function<V, ? extends C> valueAdapter) {
 		Assert.notNull(map, "Map must not be null");