diff --git a/date_api/date_api_elements.inc b/date_api/date_api_elements.inc
index 202af8f..69b3371 100644
--- a/date_api/date_api_elements.inc
+++ b/date_api/date_api_elements.inc
@@ -696,10 +696,15 @@ function date_select_validate($element, &$form_state) {
 function date_select_input_date($element, $input) {
 
   // Was anything entered? If not, we have no date.
-  $entered = array_values(array_filter($input));
-  if (empty($entered) || !is_array($input)) {
+  if (!is_array($input)) {
     return NULL;
   }
+  else {
+    $entered = array_values(array_filter($input));
+    if (empty($entered)) {
+      return NULL;
+    }
+  }
   $granularity = date_format_order($element['#date_format']);
   if (isset($input['ampm'])) {
     if ($input['ampm'] == 'pm' && $input['hour'] < 12) {