diff --git a/zxing.appspot.com/generator/src/com/google/zxing/web/generator/client/ContactInfoGenerator.java b/zxing.appspot.com/generator/src/com/google/zxing/web/generator/client/ContactInfoGenerator.java
index d5caba2ba..d3d9934e1 100644
--- a/zxing.appspot.com/generator/src/com/google/zxing/web/generator/client/ContactInfoGenerator.java
+++ b/zxing.appspot.com/generator/src/com/google/zxing/web/generator/client/ContactInfoGenerator.java
@@ -152,7 +152,9 @@ public class ContactInfoGenerator implements GeneratorSource {
   
   private String getUrlField() throws GeneratorException {
     String input = url.getText();
-    Validators.validateUrl(input);
+    if (input != null && input.length() > 0) {
+      Validators.validateUrl(input);
+    }
     return input;
   }