diff --git a/install.php b/install.php
index d2c0d6b96..f37a15435 100644
--- a/install.php
+++ b/install.php
@@ -424,7 +424,7 @@ EOT;
     }
 
     // enable popularity submission
-    if($d['pop']){
+    if(isset($d['pop']) && $d['pop']){
         @touch(DOKU_INC.'data/cache/autosubmit.txt');
     }