diff --git a/source/mysql_connection.pas b/source/mysql_connection.pas
index 351a91df..e41b9c5a 100644
--- a/source/mysql_connection.pas
+++ b/source/mysql_connection.pas
@@ -526,7 +526,7 @@ begin
       ntSSHtunnel: begin
         // Build plink.exe command line
         // plink bob@domain.com -pw myPassw0rd1 -P 22 -i "keyfile.pem" -L 55555:localhost:3306
-        PlinkCmd := FParameters.SSHPlinkExe + ' ';
+        PlinkCmd := FParameters.SSHPlinkExe + ' -ssh ';
         if FParameters.SSHUser <> '' then
           PlinkCmd := PlinkCmd + FParameters.SSHUser + '@';
         if FParameters.SSHHost <> '' then