diff --git a/utils/xmlimport.php b/utils/xmlimport.php
index e1e22e037..d091a3d41 100644
--- a/utils/xmlimport.php
+++ b/utils/xmlimport.php
@@ -867,7 +867,11 @@ function insert_document($document) { /* {{{ */
 					$file['attributes']['version'],
 					$file['attributes']['public']
 				);
-				$newfile->setDate(dateToTimestamp($file['attributes']['date']));
+				$d = dateToTimestamp($file['attributes']['date']);
+				if($d)
+					$newfile->setDate($d);
+				else
+					$logger->warning("File date (".$file['attributes']['date'].") could not be parsed.");
 				unlink($filename);
 			}
 		}