diff --git a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/DefaultLogbackConfiguration.java b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/DefaultLogbackConfiguration.java
index e49f7e2cb4..4bd530964f 100644
--- a/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/DefaultLogbackConfiguration.java
+++ b/spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/DefaultLogbackConfiguration.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2020 the original author or authors.
+ * Copyright 2012-2021 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -72,11 +72,14 @@ class DefaultLogbackConfiguration {
 				+ "%clr(%d{${LOG_DATEFORMAT_PATTERN:-yyyy-MM-dd HH:mm:ss.SSS}}){faint} %clr(${LOG_LEVEL_PATTERN:-%5p}) "
 				+ "%clr(${PID:- }){magenta} %clr(---){faint} %clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} "
 				+ "%clr(:){faint} %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"));
-		config.getContext().putProperty("CONSOLE_LOG_CHARSET", resolve(config, "${CONSOLE_LOG_CHARSET:-default}"));
+		String defaultCharset = Charset.defaultCharset().name();
+		config.getContext().putProperty("CONSOLE_LOG_CHARSET",
+				resolve(config, "${CONSOLE_LOG_CHARSET:-" + defaultCharset + "}"));
 		config.getContext().putProperty("FILE_LOG_PATTERN", resolve(config, "${FILE_LOG_PATTERN:-"
 				+ "%d{${LOG_DATEFORMAT_PATTERN:-yyyy-MM-dd HH:mm:ss.SSS}} ${LOG_LEVEL_PATTERN:-%5p} ${PID:- } --- [%t] "
 				+ "%-40.40logger{39} : %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"));
-		config.getContext().putProperty("FILE_LOG_CHARSET", resolve(config, "${FILE_LOG_CHARSET:-default}"));
+		config.getContext().putProperty("FILE_LOG_CHARSET",
+				resolve(config, "${FILE_LOG_CHARSET:-" + defaultCharset + "}"));
 		config.logger("org.apache.catalina.startup.DigesterFactory", Level.ERROR);
 		config.logger("org.apache.catalina.util.LifecycleBase", Level.ERROR);
 		config.logger("org.apache.coyote.http11.Http11NioProtocol", Level.WARN);
diff --git a/spring-boot-project/spring-boot/src/main/resources/org/springframework/boot/logging/logback/defaults.xml b/spring-boot-project/spring-boot/src/main/resources/org/springframework/boot/logging/logback/defaults.xml
index 13d78c5251..2b63702f16 100644
--- a/spring-boot-project/spring-boot/src/main/resources/org/springframework/boot/logging/logback/defaults.xml
+++ b/spring-boot-project/spring-boot/src/main/resources/org/springframework/boot/logging/logback/defaults.xml
@@ -10,9 +10,9 @@ Default logback configuration provided for import
 	<conversionRule conversionWord="wEx" converterClass="org.springframework.boot.logging.logback.ExtendedWhitespaceThrowableProxyConverter" />
 
 	<property name="CONSOLE_LOG_PATTERN" value="${CONSOLE_LOG_PATTERN:-%clr(%d{${LOG_DATEFORMAT_PATTERN:-yyyy-MM-dd HH:mm:ss.SSS}}){faint} %clr(${LOG_LEVEL_PATTERN:-%5p}) %clr(${PID:- }){magenta} %clr(---){faint} %clr([%15.15t]){faint} %clr(%-40.40logger{39}){cyan} %clr(:){faint} %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"/>
-	<property name="CONSOLE_LOG_CHARSET" value="${CONSOLE_LOG_CHARSET:-default}"/>
+	<property name="CONSOLE_LOG_CHARSET" value="${CONSOLE_LOG_CHARSET:-${file.encoding:-UTF-8}}"/>
 	<property name="FILE_LOG_PATTERN" value="${FILE_LOG_PATTERN:-%d{${LOG_DATEFORMAT_PATTERN:-yyyy-MM-dd HH:mm:ss.SSS}} ${LOG_LEVEL_PATTERN:-%5p} ${PID:- } --- [%t] %-40.40logger{39} : %m%n${LOG_EXCEPTION_CONVERSION_WORD:-%wEx}}"/>
-	<property name="FILE_LOG_CHARSET" value="${FILE_LOG_CHARSET:-default}"/>
+	<property name="FILE_LOG_CHARSET" value="${FILE_LOG_CHARSET:-${file.encoding:-UTF-8}}"/>
 
 	<logger name="org.apache.catalina.startup.DigesterFactory" level="ERROR"/>
 	<logger name="org.apache.catalina.util.LifecycleBase" level="ERROR"/>