diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/form/FillableSubscribeForm.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/form/FillableSubscribeForm.java
index 396678097..acb6c03d3 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/form/FillableSubscribeForm.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/form/FillableSubscribeForm.java
@@ -26,7 +26,7 @@ import org.jivesoftware.smackx.xdata.ListMultiFormField;
 import org.jivesoftware.smackx.xdata.form.FillableForm;
 import org.jivesoftware.smackx.xdata.packet.DataForm;
 
-public class FillableSubscribeForm extends FillableForm {
+public class FillableSubscribeForm extends FillableForm implements SubscribeFormReader {
 
     public FillableSubscribeForm(DataForm dataForm) {
         super(dataForm);