diff --git a/app/common/src/main/java/stirling/software/common/model/api/PDFFile.java b/app/common/src/main/java/stirling/software/common/model/api/PDFFile.java
index b0ba8f94c..aa811da1e 100644
--- a/app/common/src/main/java/stirling/software/common/model/api/PDFFile.java
+++ b/app/common/src/main/java/stirling/software/common/model/api/PDFFile.java
@@ -18,7 +18,7 @@ public class PDFFile {
     @Schema(description = "The input PDF file", format = "binary")
     private MultipartFile fileInput;
 
-    @Schema(description = "File ID for server-side files (can be used instead of fileInput)")
+    @Schema(description = "File ID for server-side files (can be used instead of fileInput if job was previously done on file in async mode)")
     private String fileId;
 
     @AssertTrue(message = "Either fileInput or fileId must be provided")