diff --git a/public/self/dataset_preview.js b/public/self/dataset_preview.js
index 648834d83..acda325c8 100644
--- a/public/self/dataset_preview.js
+++ b/public/self/dataset_preview.js
@@ -573,7 +573,10 @@ function next(){
 
 function clickLast(){
 	if(fileindex == 0){
+    lastindex=true;
 		prePage();
+    lastindex=false;
+
 	}else{
 		last();
 	}