diff --git a/modules/customer/commerce_customer.module b/modules/customer/commerce_customer.module
index ada3539..477528b 100644
--- a/modules/customer/commerce_customer.module
+++ b/modules/customer/commerce_customer.module
@@ -823,7 +823,7 @@ function commerce_customer_field_validate($entity_type, $entity, $field, $instan
  */
 function commerce_customer_field_is_empty($item, $field) {
   if ($field['type'] == 'commerce_customer_profile_reference') {
-    // profile_id = 0 îs empty too, which is exactly what we want.
+    // profile_id = 0 is empty too, which is exactly what we want.
     return empty($item['profile_id']);
   }
 }
diff --git a/modules/line_item/commerce_line_item.module b/modules/line_item/commerce_line_item.module
index 504e160..a648a17 100644
--- a/modules/line_item/commerce_line_item.module
+++ b/modules/line_item/commerce_line_item.module
@@ -800,7 +800,7 @@ function commerce_line_item_field_validate($entity_type, $entity, $field, $insta
  * Implements hook_field_is_empty().
  */
 function commerce_line_item_field_is_empty($item, $field) {
-  // line_item_id = 0 îs empty too, which is exactly what we want.
+  // line_item_id = 0 is empty too, which is exactly what we want.
   return empty($item['line_item_id']);
 }
 
diff --git a/modules/product_reference/commerce_product_reference.module b/modules/product_reference/commerce_product_reference.module
index 5eff3ff..0d2817d 100644
--- a/modules/product_reference/commerce_product_reference.module
+++ b/modules/product_reference/commerce_product_reference.module
@@ -506,7 +506,7 @@ function commerce_product_reference_field_validate($entity_type, $entity, $field
  * Implements hook_field_is_empty().
  */
 function commerce_product_reference_field_is_empty($item, $field) {
-  // product_id = 0 îs empty too, which is exactly what we want.
+  // product_id = 0 is empty too, which is exactly what we want.
   return empty($item['product_id']);
 }