diff --git a/libraries/classes/InsertEdit.php b/libraries/classes/InsertEdit.php
index 87e65d52d1..0c6b2e2e73 100644
--- a/libraries/classes/InsertEdit.php
+++ b/libraries/classes/InsertEdit.php
@@ -342,7 +342,7 @@ class InsertEdit
         };
 
         // can only occur once per table
-        $column['first_timestamp'] = $column['True_Type'] === 'timestamp' ? ! $timestampSeen : false;
+        $column['first_timestamp'] = $column['True_Type'] === 'timestamp' && ! $timestampSeen;
 
         return $column;
     }