diff --git a/core/src/main/java/hudson/util/FormFieldValidator.java b/core/src/main/java/hudson/util/FormFieldValidator.java
index 03804cdbee2a0a57afeffa94a539ec56dcb89e84..9f3653a549ac16a04cf5ee6a730b7f96418bb98e 100644
--- a/core/src/main/java/hudson/util/FormFieldValidator.java
+++ b/core/src/main/java/hudson/util/FormFieldValidator.java
@@ -249,11 +249,8 @@ public abstract class FormFieldValidator {
      * @since 1.116.
      */
     public static class WorkspaceDirectory extends WorkspaceFilePath {
-        private final boolean errorIfNotExist;
-
         public WorkspaceDirectory(StaplerRequest request, StaplerResponse response, boolean errorIfNotExist) {
-            super(request, response, false, false);
-            this.errorIfNotExist = errorIfNotExist;
+            super(request, response, errorIfNotExist, false);
         }
 
         public WorkspaceDirectory(StaplerRequest request, StaplerResponse response) {