diff --git a/src/legacytilesource.js b/src/legacytilesource.js
index 80891b43..b661b967 100644
--- a/src/legacytilesource.js
+++ b/src/legacytilesource.js
@@ -215,7 +215,7 @@ function filterFiles( files ){
         if( file.height &&
             file.width &&
             file.url && (
-                file.url.toLowerCase().match(/^.*\.(png|jpg|jpeg|gif)$/) || (
+                file.url.toLowerCase().match(/^.*\.(png|jpg|jpeg|gif)(?:\?.*)?$/) || (
                     file.mimetype &&
                     file.mimetype.toLowerCase().match(/^.*\/(png|jpg|jpeg|gif)$/)
                 )