diff --git a/magmi/engines/magmi_productimportengine.php b/magmi/engines/magmi_productimportengine.php
index cf0070aa..37cde4ef 100755
--- a/magmi/engines/magmi_productimportengine.php
+++ b/magmi/engines/magmi_productimportengine.php
@@ -1684,7 +1684,7 @@ public function createAttributes($pid, &$item, $attmap, $isnew, $itemids)
                         $data[] = $attid;
                         $data[] = $store_id;
                         $data[] = $pid;
-                        $data[] = $ovalue == '__NULL__' ? null : $ovalue;
+                        $data[] = $ovalue === '__NULL__' ? null : $ovalue;
                         $insstr = "(?,?,?,?,?)";
                         $inserts[] = $insstr;
                     }