diff --git a/spring-boot/src/main/java/org/springframework/boot/logging/LogFile.java b/spring-boot/src/main/java/org/springframework/boot/logging/LogFile.java
index 3d68844fe7..e40d86da01 100644
--- a/spring-boot/src/main/java/org/springframework/boot/logging/LogFile.java
+++ b/spring-boot/src/main/java/org/springframework/boot/logging/LogFile.java
@@ -83,8 +83,8 @@ public class LogFile {
 	 * @param properties the properties to apply to
 	 */
 	public void applyTo(Properties properties) {
-		put(properties, "LOG_PATH", this.path);
-		put(properties, "LOG_FILE", toString());
+		put(properties, LoggingApplicationListener.LOG_PATH, this.path);
+		put(properties, LoggingApplicationListener.LOG_FILE, toString());
 	}
 
 	private void put(Properties properties, String key, String value) {
diff --git a/spring-boot/src/main/java/org/springframework/boot/logging/LoggingApplicationListener.java b/spring-boot/src/main/java/org/springframework/boot/logging/LoggingApplicationListener.java
index 5cb49a0074..1b64ee2654 100644
--- a/spring-boot/src/main/java/org/springframework/boot/logging/LoggingApplicationListener.java
+++ b/spring-boot/src/main/java/org/springframework/boot/logging/LoggingApplicationListener.java
@@ -98,23 +98,25 @@ public class LoggingApplicationListener implements GenericApplicationListener {
 	 * The name of the Spring property that contains the directory where log files are
 	 * written.
 	 */
+	@Deprecated
 	public static final String PATH_PROPERTY = LogFile.PATH_PROPERTY;
 
 	/**
 	 * The name of the Spring property that contains the name of the log file. Names can
 	 * be an exact location or relative to the current directory.
 	 */
+	@Deprecated
 	public static final String FILE_PROPERTY = LogFile.FILE_PROPERTY;
 
 	/**
 	 * The name of the System property that contains the process ID.
 	 */
-	public static final String PID_KEY = LoggingSystemProperties.PID_KEY;
+	public static final String PID_KEY = "PID";
 
 	/**
 	 * The name of the System property that contains the exception conversion word.
 	 */
-	public static final String EXCEPTION_CONVERSION_WORD = LoggingSystemProperties.EXCEPTION_CONVERSION_WORD;
+	public static final String EXCEPTION_CONVERSION_WORD = "LOG_EXCEPTION_CONVERSION_WORD";
 
 	/**
 	 * The name of the System property that contains the log file.
@@ -129,17 +131,17 @@ public class LoggingApplicationListener implements GenericApplicationListener {
 	/**
 	 * The name of the System property that contains the console log pattern.
 	 */
-	public static final String CONSOLE_LOG_PATTERN = LoggingSystemProperties.CONSOLE_LOG_PATTERN;
+	public static final String CONSOLE_LOG_PATTERN = "CONSOLE_LOG_PATTERN";
 
 	/**
 	 * The name of the System property that contains the file log pattern.
 	 */
-	public static final String FILE_LOG_PATTERN = LoggingSystemProperties.FILE_LOG_PATTERN;
+	public static final String FILE_LOG_PATTERN = "FILE_LOG_PATTERN";
 
 	/**
 	 * The name of the System property that contains the log level pattern.
 	 */
-	public static final String LOG_LEVEL_PATTERN = LoggingSystemProperties.LOG_LEVEL_PATTERN;
+	public static final String LOG_LEVEL_PATTERN = "LOG_LEVEL_PATTERN";
 
 	/**
 	 * The name of the {@link LoggingSystem} bean.
diff --git a/spring-boot/src/main/java/org/springframework/boot/logging/LoggingSystemProperties.java b/spring-boot/src/main/java/org/springframework/boot/logging/LoggingSystemProperties.java
index 14337f2037..7e815cc94d 100644
--- a/spring-boot/src/main/java/org/springframework/boot/logging/LoggingSystemProperties.java
+++ b/spring-boot/src/main/java/org/springframework/boot/logging/LoggingSystemProperties.java
@@ -28,15 +28,15 @@ import org.springframework.core.env.Environment;
  */
 class LoggingSystemProperties {
 
-	static final String PID_KEY = "PID";
+	static final String PID_KEY = LoggingApplicationListener.PID_KEY;
 
-	static final String EXCEPTION_CONVERSION_WORD = "LOG_EXCEPTION_CONVERSION_WORD";
+	static final String EXCEPTION_CONVERSION_WORD = LoggingApplicationListener.EXCEPTION_CONVERSION_WORD;
 
-	static final String CONSOLE_LOG_PATTERN = "CONSOLE_LOG_PATTERN";
+	static final String CONSOLE_LOG_PATTERN = LoggingApplicationListener.CONSOLE_LOG_PATTERN;
 
-	static final String FILE_LOG_PATTERN = "FILE_LOG_PATTERN";
+	static final String FILE_LOG_PATTERN = LoggingApplicationListener.FILE_LOG_PATTERN;
 
-	static final String LOG_LEVEL_PATTERN = "LOG_LEVEL_PATTERN";
+	static final String LOG_LEVEL_PATTERN = LoggingApplicationListener.LOG_LEVEL_PATTERN;
 
 	private final Environment environment;