diff --git a/apachesolr.module b/apachesolr.module
index 440d4a0..13e8d5e 100644
--- a/apachesolr.module
+++ b/apachesolr.module
@@ -1106,7 +1106,7 @@ function apachesolr_set_default_environment($env_id) {
  *
  *
  * @param string $env_id
- * 
+ *
  * @return DrupalApacheSolrServiceInterface $solr
  *
  * @throws Exception
@@ -2017,6 +2017,12 @@ function apachesolr_entity_fields($entity_type = 'node') {
         // The field info array.
         $row['field'] = $field;
 
+        // Cardinality: The number of values the field can hold. Legal values
+        //  are any positive integer or FIELD_CARDINALITY_UNLIMITED.
+        if ($row['field']['cardinality'] != 1) {
+          $row['multiple'] = TRUE;
+        }
+
         // @todo: for fields like taxonomy we are indexing multiple Solr fields
         // per entity field, but are keying on a single Solr field name here.
         $function = !empty($row['name callback']) ? $row['name callback'] : NULL;
@@ -2751,4 +2757,4 @@ function apachesolr_ctools_environment_export($environment, $indent) {
   $additions_top = array();
   $additions_bottom = array('conf' => $environment->conf, 'index_bundles' => $index_bundles);
   return ctools_export_object('apachesolr_environment', $environment, $indent, NULL, $additions_top, $additions_bottom);
-}
\ No newline at end of file
+}