Index: src/main/java/org/xmpp/forms/DataForm.java
===================================================================
--- src/main/java/org/xmpp/forms/DataForm.java	(revision 11085)
+++ src/main/java/org/xmpp/forms/DataForm.java	(working copy)
@@ -221,7 +221,7 @@
      */
     public FormField addField(String variable, String label, FormField.Type type) {
     	final FormField result = addField();
-    	if (variable == null || variable.trim().length() == 0) {
+    	if (variable != null && variable.trim().length() >= 0) {
     		result.setVariable(variable);
     	}
     	
@@ -229,7 +229,7 @@
     		result.setType(type);
     	}
     	
-    	if (label != null && label.trim().length() == 0) {
+    	if (label != null && label.trim().length() >= 0) {
     		result.setLabel(label);
     	}