diff --git a/cfgs/config/advanced.cfg b/cfgs/config/advanced.cfg
index 771d951..ada5b43 100644
--- a/cfgs/config/advanced.cfg
+++ b/cfgs/config/advanced.cfg
@@ -1415,7 +1415,7 @@ XLATCHARSET CP866     WIN          866_win.chs
 ;XLATCHARSETALIAS ISO-11 ISO-8859-11 ISO8859-11
 // Common invalid configurations and different charsets names
 XLATCHARSETALIAS CP437 IBMPC
-XLATCHARSETALIAS CP866 CP-866 +7FIDO +7_FIDO FIDO7 FIDO_7
+XLATCHARSETALIAS CP866 CP-866 +7FIDO +7_FIDO FIDO7 FIDO_7 RUS
 XLATCHARSETALIAS KOI8-R KOI8R KOI KOI8 GOST CP20866
 XLATCHARSETALIAS KOI8-U KOI8U KOU KOI-U CP21866
 XLATCHARSETALIAS ISO8859-1 ISO-8859-1 ISO_8859-1 CP28591 ISO-1 LATIN-1 ISO
diff --git a/cfgs/config/advanced.rus b/cfgs/config/advanced.rus
index ab6650c..a4e1d68 100644
--- a/cfgs/config/advanced.rus
+++ b/cfgs/config/advanced.rus
@@ -1660,7 +1660,7 @@ XlatCharSet CP850       ASCII       850_ASC.chs
 // Часто встречающиеся ошибки и разные варианты написания
 XLATCHARSETALIAS CP437 IBMPC
 ;XLATCHARSETALIAS CP866 CP-866 +7FIDO +7_FIDO FIDO7 FIDO_7 IBMPC
-XLATCHARSETALIAS CP866 CP-866 +7FIDO +7_FIDO FIDO7 FIDO_7
+XLATCHARSETALIAS CP866 CP-866 +7FIDO +7_FIDO FIDO7 FIDO_7 RUS
 XLATCHARSETALIAS KOI8-R KOI8R KOI KOI8 GOST CP20866
 XLATCHARSETALIAS KOI8-U KOI8U KOU KOI-U CP21866
 XLATCHARSETALIAS ISO8859-1 ISO-8859-1 ISO_8859-1 CP28591 ISO-1 LATIN-1