diff --git a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerProperties.java b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerProperties.java
index e59e1a1712..b71ad45586 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerProperties.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerProperties.java
@@ -230,6 +230,7 @@ public class ServerProperties {
 		@NestedConfigurationProperty
 		private final Jsp jsp = new Jsp();
 
+		@NestedConfigurationProperty
 		private final Session session = new Session();
 
 		public String getContextPath() {