diff --git a/modules/product/includes/commerce_product.forms.inc b/modules/product/includes/commerce_product.forms.inc
index 7d477d2..5ff95ae 100644
--- a/modules/product/includes/commerce_product.forms.inc
+++ b/modules/product/includes/commerce_product.forms.inc
@@ -171,7 +171,7 @@ function commerce_product_product_form_submit($form, &$form_state) {
     $product->uid = $user->uid;
   }
 
-  if ($form_state['values']['revision'] || !empty($form_state['values']['log'])) {
+  if (!empty($form_state['values']['revision']) || !empty($form_state['values']['log'])) {
     $product->revision = TRUE;
     $product->log = $form_state['values']['log'];
   }