diff --git a/adminer/drivers/mssql.inc.php b/adminer/drivers/mssql.inc.php
index 8a05696c..c16a0c13 100644
--- a/adminer/drivers/mssql.inc.php
+++ b/adminer/drivers/mssql.inc.php
@@ -92,7 +92,7 @@ if (isset($_GET["mssql"])) {
 			}
 
 			function next_result(): bool {
-				return $this->result ? sqlsrv_next_result($this->result) : null;
+				return $this->result ? !!sqlsrv_next_result($this->result) : false;
 			}
 		}