diff --git a/libraries/classes/Plugins/Export/Helpers/Pdf.php b/libraries/classes/Plugins/Export/Helpers/Pdf.php
index 44a633ba1203..22e1a63dcce1 100644
--- a/libraries/classes/Plugins/Export/Helpers/Pdf.php
+++ b/libraries/classes/Plugins/Export/Helpers/Pdf.php
@@ -829,7 +829,7 @@ public function mysqlReport($query)
         }
 
         for ($i = 0; $i < $this->numFields; $i++) {
-            if (!in_array($i, array_keys($colFits))) {
+            if (!array_key_exists($i, $colFits)) {
                 $this->tablewidths[$i] = $this->sColWidth + $surplusToAdd;
             }
             if ($this->display_column[$i] == false) {