diff --git a/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/EndpointMBeanExportProperties.java b/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/EndpointMBeanExportProperties.java
index ede8d9882b..abfd2222ee 100644
--- a/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/EndpointMBeanExportProperties.java
+++ b/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/autoconfigure/EndpointMBeanExportProperties.java
@@ -33,7 +33,7 @@ public class EndpointMBeanExportProperties {
 	/**
 	 * JMX domain name. Initialized with the value of 'spring.jmx.default-domain' if set.
 	 */
-	@Value("${spring.jmx.default_domain:}")
+	@Value("${spring.jmx.default-domain:}")
 	private String domain;
 
 	/**
diff --git a/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/integration/IntegrationAutoConfiguration.java b/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/integration/IntegrationAutoConfiguration.java
index c594c268b9..788ce64acc 100644
--- a/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/integration/IntegrationAutoConfiguration.java
+++ b/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/integration/IntegrationAutoConfiguration.java
@@ -52,7 +52,7 @@ public class IntegrationAutoConfiguration {
 	@ConditionalOnClass(EnableIntegrationMBeanExport.class)
 	@ConditionalOnMissingBean(value = IntegrationMBeanExporter.class, search = SearchStrategy.CURRENT)
 	@ConditionalOnProperty(prefix = "spring.jmx", name = "enabled", havingValue = "true", matchIfMissing = true)
-	@EnableIntegrationMBeanExport(defaultDomain = "${spring.jmx.default_domain:}", server = "${spring.jmx.server:mbeanServer}")
+	@EnableIntegrationMBeanExport(defaultDomain = "${spring.jmx.default-domain:}", server = "${spring.jmx.server:mbeanServer}")
 	protected static class IntegrationJmxConfiguration {
 	}
 
diff --git a/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jmx/JmxAutoConfigurationTests.java b/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jmx/JmxAutoConfigurationTests.java
index 0dc64cc38d..d9a9b2085c 100644
--- a/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jmx/JmxAutoConfigurationTests.java
+++ b/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/jmx/JmxAutoConfigurationTests.java
@@ -96,7 +96,7 @@ public class JmxAutoConfigurationTests {
 	public void testDefaultDomainConfiguredOnMBeanExport() {
 		MockEnvironment env = new MockEnvironment();
 		env.setProperty("spring.jmx.enabled", "true");
-		env.setProperty("spring.jmx.default_domain", "my-test-domain");
+		env.setProperty("spring.jmx.default-domain", "my-test-domain");
 		this.context = new AnnotationConfigApplicationContext();
 		this.context.setEnvironment(env);
 		this.context.register(TestConfiguration.class, JmxAutoConfiguration.class);