diff --git a/uc_product/uc_product.module b/uc_product/uc_product.module
index d2d5166..4997314 100644
--- a/uc_product/uc_product.module
+++ b/uc_product/uc_product.module
@@ -2129,19 +2129,26 @@ function uc_product_add_default_image_field($type = NULL) {
     $types = uc_product_types();
   }
   foreach ($types as $type) {
-    $field['type_name'] = $type;
-
     $field_name = variable_get('uc_image_'. $type, '');
     if (empty($field_name)) {
       $field_name = 'field_image_cache';
     }
-    $field['field_name'] = $field_name;
 
+    // Only add the field if it doesn't exist. Don't overwrite any changes.
     $instances = content_field_instance_read(array('field_name' => $field_name, 'type_name' => $type));
-
     if (count($instances) < 1) {
-      // Only add the field if it doesn't exist. Don't overwrite any changes.
-      content_field_instance_create($field);
+      $prior_instances = content_field_instance_read(array('field_name' => $field_name));
+      if ($prior_instances) {
+        // Copy the prior instance.
+        content_field_instance_create(array('field_name' => $field_name, 'type_name' => $type));
+      }
+      else {
+        // Create a new field and instance.
+        $field['field_name'] = $field_name;
+        $field['type_name'] = $type;
+        content_field_instance_create($field);
+      }
+
       variable_set('uc_image_'. $type, $field_name);
     }
   }