diff --git a/filesystem/File.php b/filesystem/File.php
index d88f00af1..358c190be 100644
--- a/filesystem/File.php
+++ b/filesystem/File.php
@@ -732,7 +732,7 @@ class File extends DataObject {
 	}
 
 	/**
-	 * Does not change the filesystem itself, please use {@link write()} for this.
+	 * Caution: this does not change the location of the file on the filesystem.
 	 */
 	public function setFilename($val) {
 		$this->setField('Filename', $val);