diff --git a/plugins/firebird/firebird b/plugins/firebird/firebird
index 74781a9b..972d741d 100755
--- a/plugins/firebird/firebird
+++ b/plugins/firebird/firebird
@@ -47,7 +47,7 @@ EOM
 exit 0;;
 esac
 
-db=${0/firebird_/}
+db=$(echo $0 | awk -F'_' '{print $2}')
 
 gstat=$(which gstat 2> /dev/null)