diff -u b/webform_features.install b/webform_features.install
--- b/webform_features.install
+++ b/webform_features.install
@@ -66,6 +66,7 @@
     $machine_name = $node->title;
     $machine_name = drupal_strtolower($machine_name);
     $machine_name = preg_replace('#[^a-z]+#', '_', $machine_name);
+    $machine_name = substr($machine_name, 0, $maxlength);
 
     // Ensure machine name is unique
     $name = $machine_name;
@@ -105,6 +106,7 @@
 
     // Build machine name from the webform's one and the form_key
     $machine_name = $result->webform_machine_name . '-' . $result->form_key;
+    $machine_name = substr($machine_name, 0, $maxlength);
 
     // Ensure machine name is unique
     $name = $machine_name;