diff --git a/spring-boot/src/main/java/org/springframework/boot/context/properties/source/ConfigurationPropertySource.java b/spring-boot/src/main/java/org/springframework/boot/context/properties/source/ConfigurationPropertySource.java
index cb89c98bf9a..1a37036c4f7 100644
--- a/spring-boot/src/main/java/org/springframework/boot/context/properties/source/ConfigurationPropertySource.java
+++ b/spring-boot/src/main/java/org/springframework/boot/context/properties/source/ConfigurationPropertySource.java
@@ -19,6 +19,7 @@ package org.springframework.boot.context.properties.source;
 import java.util.function.Predicate;
 
 import org.springframework.boot.origin.OriginTrackedValue;
+import org.springframework.core.env.PropertySource;
 
 /**
  * A source of {@link ConfigurationProperty ConfigurationProperties}.
@@ -73,7 +74,7 @@ public interface ConfigurationPropertySource {
 	}
 
 	/**
-	 * Return the underlying {@PropertySource}.
+	 * Return the underlying {@link PropertySource}.
 	 * @return the underlying property source.
 	 */
 	Object getUnderlyingSource();
diff --git a/spring-boot/src/main/java/org/springframework/boot/context/properties/source/UnboundElementsSourceFilter.java b/spring-boot/src/main/java/org/springframework/boot/context/properties/source/UnboundElementsSourceFilter.java
index 2b857c60e12..4cf647022a2 100644
--- a/spring-boot/src/main/java/org/springframework/boot/context/properties/source/UnboundElementsSourceFilter.java
+++ b/spring-boot/src/main/java/org/springframework/boot/context/properties/source/UnboundElementsSourceFilter.java
@@ -28,7 +28,7 @@ import org.springframework.core.env.StandardEnvironment;
 /**
  * Function used to determine if a {@link ConfigurationPropertySource} should be
  * included when determining unbound elements. If the underlying {@link PropertySource}
- * is a systemEnvironment or systemProperties property source , it will not be considered
+ * is a systemEnvironment or systemProperties property source, it will not be considered
  * for unbound element failures.
  *
  * @author Madhura Bhave