diff --git a/libraries/classes/Import.php b/libraries/classes/Import.php
index 40a744a9f1..6f12afecf6 100644
--- a/libraries/classes/Import.php
+++ b/libraries/classes/Import.php
@@ -814,6 +814,10 @@ class Import
             return self::BIGINT;
         }
 
+        if ($cell !== (string)(int)$cell) {
+            return self::VARCHAR;
+        }
+
         return self::INT;
     }