diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/tomcat/SslConnectorCustomizer.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/tomcat/SslConnectorCustomizer.java
index 673d7c69116..1aeb3c1a3a8 100644
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/tomcat/SslConnectorCustomizer.java
+++ b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/embedded/tomcat/SslConnectorCustomizer.java
@@ -108,7 +108,7 @@ class SslConnectorCustomizer implements TomcatConnectorCustomizer {
 	private void configureEnabledProtocols(AbstractHttp11JsseProtocol<?> protocol, Ssl ssl) {
 		if (ssl.getEnabledProtocols() != null) {
 			for (SSLHostConfig sslHostConfig : protocol.findSslHostConfigs()) {
-				sslHostConfig.setProtocols(StringUtils.arrayToCommaDelimitedString(ssl.getEnabledProtocols()));
+				sslHostConfig.setProtocols(StringUtils.arrayToDelimitedString(ssl.getEnabledProtocols(), "+"));
 			}
 		}
 	}