diff --git a/pmd-java/src/main/resources/rulesets/java/strings.xml b/pmd-java/src/main/resources/rulesets/java/strings.xml
index dc3f70cd76..c09cbbbed2 100644
--- a/pmd-java/src/main/resources/rulesets/java/strings.xml
+++ b/pmd-java/src/main/resources/rulesets/java/strings.xml
@@ -221,7 +221,10 @@ if (s.indexOf('d') {}
 String.trim().length() is an inefficient way to check if a String is really empty, as it
 creates a new String object just to check its size. Consider creating a static function that
 loops through a string, checking Character.isWhitespace() on each character and returning
-false if a non-whitespace character is found.
+false if a non-whitespace character is found. Note that Apache's commons-lang library includes
+the isBlank function, which does exactly that. You can also copy the source code of the function
+(https://commons.apache.org/proper/commons-lang/apidocs/src-html/org/apache/commons/lang3/StringUtils.html#line.296)
+if you'd rather not add the library to your classpath.
     </description>
        <priority>3</priority>
     <example>