diff --git a/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/web/mappings/MappingsEndpoint.java b/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/web/mappings/MappingsEndpoint.java
index 062b66c68e9..119c5a4b7cf 100644
--- a/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/web/mappings/MappingsEndpoint.java
+++ b/spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/web/mappings/MappingsEndpoint.java
@@ -29,6 +29,7 @@ import org.springframework.context.ApplicationContext;
  * {@link Endpoint @Endpoint} to expose HTTP request mappings.
  *
  * @author Andy Wilkinson
+ * @author Lee JiWon
  * @since 2.0.0
  */
 @Endpoint(id = "mappings")
@@ -58,8 +59,8 @@ public class MappingsEndpoint {
 		Map<String, Object> mappings = new HashMap<>();
 		this.descriptionProviders.forEach(
 				(provider) -> mappings.put(provider.getMappingName(), provider.describeMappings(applicationContext)));
-		return new ContextMappingsDescriptor(mappings,
-				(applicationContext.getParent() != null) ? applicationContext.getParent().getId() : null);
+		ApplicationContext parent = applicationContext.getParent();
+		return new ContextMappingsDescriptor(mappings, (parent != null) ? parent.getId() : null);
 	}
 
 	/**