diff --git a/system/Database/MySQLi/Connection.php b/system/Database/MySQLi/Connection.php
index f2a255546cc2..7492095792c3 100644
--- a/system/Database/MySQLi/Connection.php
+++ b/system/Database/MySQLi/Connection.php
@@ -419,7 +419,7 @@ protected function _fieldData(string $table): array
             $unsigned = null;
             sscanf($query[$i]->Type, '%[a-z](%[0-9,]) %[a-z]', $retVal[$i]->type, $retVal[$i]->length, $unsigned);
 
-            $exp                        = explode(',', $retVal[$i]->length);
+            $exp                        = explode(',', $retVal[$i]->length ?? '');
             $retVal[$i]->max_length     = isset($exp[0]) ? (int) $exp[0] : 0;
             $retVal[$i]->decimal_places = isset($exp[1]) ? (int) $exp[1] : 0;