diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/task/ThreadPoolTaskSchedulerBuilder.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/task/ThreadPoolTaskSchedulerBuilder.java
index de44c43fdf8..07e72d3cdc3 100644
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/task/ThreadPoolTaskSchedulerBuilder.java
+++ b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/task/ThreadPoolTaskSchedulerBuilder.java
@@ -228,7 +228,7 @@ public class ThreadPoolTaskSchedulerBuilder {
 		PropertyMapper map = PropertyMapper.get().alwaysApplyingWhenNonNull();
 		map.from(this.poolSize).to(taskScheduler::setPoolSize);
 		map.from(this.awaitTermination).to(taskScheduler::setWaitForTasksToCompleteOnShutdown);
-		map.from(this.awaitTerminationPeriod).asInt(Duration::toMillis).to(taskScheduler::setAwaitTerminationMillis);
+		map.from(this.awaitTerminationPeriod).as(Duration::toMillis).to(taskScheduler::setAwaitTerminationMillis);
 		map.from(this.threadNamePrefix).to(taskScheduler::setThreadNamePrefix);
 		map.from(this.taskDecorator).to(taskScheduler::setTaskDecorator);
 		if (!CollectionUtils.isEmpty(this.customizers)) {