diff --git a/api/src/main/java/jakarta/servlet/MultipartConfigElement.java b/api/src/main/java/jakarta/servlet/MultipartConfigElement.java
index 91cf672d5..0634694f9 100644
--- a/api/src/main/java/jakarta/servlet/MultipartConfigElement.java
+++ b/api/src/main/java/jakarta/servlet/MultipartConfigElement.java
@@ -106,7 +106,8 @@ public long getMaxRequestSize() {
     }
 
     /**
-     * Gets the size threshold after which files will be written to disk.
+     * Gets the size threshold after which files will be written to disk. A value of zero means files must always be written
+     * to disk.
      *
      * @return the size threshold after which files will be written to disk
      */