diff --git a/components/zeosdbo/src/component/ZConnection.pas b/components/zeosdbo/src/component/ZConnection.pas
index 30d45233..2ccf89a5 100644
--- a/components/zeosdbo/src/component/ZConnection.pas
+++ b/components/zeosdbo/src/component/ZConnection.pas
@@ -112,7 +112,7 @@ type
     FProtocol: string;
     FHostName: string;
     FPort: Integer;
-    FDatabase: string;
+    FDatabase: WideString;
     FUser: string;
     FPassword: string;
     FCatalog: string;
@@ -218,7 +218,7 @@ type
     property Protocol: string read FProtocol write FProtocol;
     property HostName: string read FHostName write FHostName;
     property Port: Integer read FPort write FPort default 0;
-    property Database: string read FDatabase write FDatabase;
+    property Database: WideString read FDatabase write FDatabase;
     property User: string read FUser write FUser;
     property Password: string read FPassword write FPassword;
     property Catalog: string read FCatalog write FCatalog;
diff --git a/source/mysqlquerythread.pas b/source/mysqlquerythread.pas
index 0a0bfa51..3a2105e8 100644
--- a/source/mysqlquerythread.pas
+++ b/source/mysqlquerythread.pas
@@ -21,8 +21,8 @@ type
 
   // Mysql protocol-relevant connection parameter structure
   TMysqlConnParams = record
-    Host,
-    Database,
+    Host: String;
+    Database: WideString;
     Protocol,
     User,
     Pass : String;