diff --git a/help/help_mp-ru.h.charset b/help/help_mp-ru.h.charset
index b0e7a83469..32362f842a 100644
--- a/help/help_mp-ru.h.charset
+++ b/help/help_mp-ru.h.charset
@@ -1 +1 @@
-KOI8R
+KOI8-R