diff --git a/spring-core/src/main/java/org/springframework/core/SpringProperties.java b/spring-core/src/main/java/org/springframework/core/SpringProperties.java
index dc7470458b..9ff9f5a71c 100644
--- a/spring-core/src/main/java/org/springframework/core/SpringProperties.java
+++ b/spring-core/src/main/java/org/springframework/core/SpringProperties.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2020 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -38,9 +38,14 @@ import org.springframework.lang.Nullable;
  *
  * @author Juergen Hoeller
  * @since 3.2.7
- * @see org.springframework.core.env.AbstractEnvironment#IGNORE_GETENV_PROPERTY_NAME
  * @see org.springframework.beans.CachedIntrospectionResults#IGNORE_BEANINFO_PROPERTY_NAME
+ * @see org.springframework.context.index.CandidateComponentsIndexLoader#IGNORE_INDEX
+ * @see org.springframework.core.env.AbstractEnvironment#IGNORE_GETENV_PROPERTY_NAME
+ * @see org.springframework.expression.spel.SpelParserConfiguration#SPRING_EXPRESSION_COMPILER_MODE_PROPERTY_NAME
  * @see org.springframework.jdbc.core.StatementCreatorUtils#IGNORE_GETPARAMETERTYPE_PROPERTY_NAME
+ * @see org.springframework.jndi.JndiLocatorDelegate#IGNORE_JNDI_PROPERTY_NAME
+ * @see org.springframework.test.context.NestedTestConfiguration#ENCLOSING_CONFIGURATION_PROPERTY_NAME
+ * @see org.springframework.test.context.TestConstructor#TEST_CONSTRUCTOR_AUTOWIRE_MODE_PROPERTY_NAME
  * @see org.springframework.test.context.cache.ContextCache#MAX_CONTEXT_CACHE_SIZE_PROPERTY_NAME
  */
 public final class SpringProperties {
diff --git a/spring-expression/src/main/java/org/springframework/expression/spel/SpelParserConfiguration.java b/spring-expression/src/main/java/org/springframework/expression/spel/SpelParserConfiguration.java
index fb1260570d..e9757c195f 100644
--- a/spring-expression/src/main/java/org/springframework/expression/spel/SpelParserConfiguration.java
+++ b/spring-expression/src/main/java/org/springframework/expression/spel/SpelParserConfiguration.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2017 the original author or authors.
+ * Copyright 2002-2021 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.
@@ -30,10 +30,17 @@ import org.springframework.lang.Nullable;
  */
 public class SpelParserConfiguration {
 
+	/**
+	 * System property that is used to configure the default compiler mode for
+	 * SpEL expression parsers: {@value}
+	 */
+	public static final String SPRING_EXPRESSION_COMPILER_MODE_PROPERTY_NAME = "spring.expression.compiler.mode";
+
+
 	private static final SpelCompilerMode defaultCompilerMode;
 
 	static {
-		String compilerMode = SpringProperties.getProperty("spring.expression.compiler.mode");
+		String compilerMode = SpringProperties.getProperty(SPRING_EXPRESSION_COMPILER_MODE_PROPERTY_NAME);
 		defaultCompilerMode = (compilerMode != null ?
 				SpelCompilerMode.valueOf(compilerMode.toUpperCase()) : SpelCompilerMode.OFF);
 	}
@@ -107,7 +114,7 @@ public class SpelParserConfiguration {
 
 
 	/**
-	 * Return the configuration mode for parsers using this configuration object.
+	 * Return the compiler mode for parsers using this configuration object.
 	 */
 	public SpelCompilerMode getCompilerMode() {
 		return this.compilerMode;