diff --git a/cfgs/charset/866_koi.chs b/cfgs/charset/866_koi.chs
index a0ce486..8fc8e9e 100644
--- a/cfgs/charset/866_koi.chs
+++ b/cfgs/charset/866_koi.chs
@@ -152,5 +152,5 @@ KOI8-R	; to charset
 \x4e \x6f	; LATIN CAPITAL LETTER N + LATIN SMALL LETTER O
 \0 ?	; unable to convert adequately
 \0 \x94	; BLACK SQUARE
-\0 \x9a	; NO-BREAK SPACE
+\0 \x20	; NO-BREAK SPACE
 END
diff --git a/cfgs/charset/koi_866.chs b/cfgs/charset/koi_866.chs
index 7a17ba2..d05555d 100644
--- a/cfgs/charset/koi_866.chs
+++ b/cfgs/charset/koi_866.chs
@@ -34,7 +34,7 @@ cp866	; to charset
 \0 ?	; unable to convert adequately
 \0 ?	; unable to convert adequately
 \0 ?	; unable to convert adequately
-\0 \xff	; NO-BREAK SPACE
+\0 \x20	; NO-BREAK SPACE
 \0 ?	; unable to convert adequately
 \0 \xf8	; DEGREE SIGN
 \0 \x32	; DIGIT TWO