diff --git a/includes/webform.report.inc b/includes/webform.report.inc
index 89dc1ce..495ecbc 100644
--- a/includes/webform.report.inc
+++ b/includes/webform.report.inc
@@ -751,6 +751,7 @@
 
   // Generate a row for each submission.
   $row_count = 0;
+  $sid = 0;
   foreach ($submissions as $sid => $submission) {
     $row_count++;