diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/xdata/Form.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/xdata/Form.java
index 39e639304..63c8e5b5b 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/xdata/Form.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/xdata/Form.java
@@ -235,7 +235,7 @@ public class Form {
         if (field.getType() != FormField.Type.bool) {
             throw new IllegalArgumentException("This field is not of type boolean.");
         }
-        setAnswer(field, (value ? "1" : "0"));
+        setAnswer(field, Boolean.toString(value));
     }
 
     /**