--- mcore-src/trunk/mcore-tools/src/modules/rdesktop/rdesktop.control.class.in	2016/01/28 15:24:20	2740
+++ mcore-src/trunk/mcore-tools/src/modules/rdesktop/rdesktop.control.class.in	2016/01/28 15:25:13	2741
@@ -80,7 +80,7 @@
 			[[ -z ${cfg_sessions_rdesktop_username} ]] && cfg_sessions_rdesktop_username="NULL"
 			[[ -z ${cfg_sessions_rdesktop_domain} ]] && cfg_sessions_rdesktop_domain="NULL"
 			[[ -z ${cfg_sessions_rdesktop_password} ]] && cfg_sessions_rdesktop_password="NULL"
-			[[ ${cfg_sessions_rdesktop_shell} ]] && cfg_sessions_rdesktop_shell="NULL"
+			[[ -z cfg_sessions_rdesktop_shell ]] && cfg_sessions_rdesktop_shell="NULL"
 
 			decho "cfg_sessions_rdesktop_username='${cfg_sessions_rdesktop_username}'"
 			decho "cfg_sessions_rdesktop_domain='${cfg_sessions_rdesktop_domain}'"