X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/9a4486bdcf2846b43a6cd32697359871663ae27b..193c58debae5ae0e21fe9716aed575a817940bfe:/charset/mimeenc.c

diff --git a/charset/mimeenc.c b/charset/mimeenc.c
index b255c65c..93ad89e7 100644
--- a/charset/mimeenc.c
+++ b/charset/mimeenc.c
@@ -135,6 +135,11 @@ static const struct {
     { "850", CS_CP850 },
     { "csPC850Multilingual", CS_CP850 },
 
+    { "IBM866", CS_CP866 },
+    { "cp866", CS_CP866 },
+    { "866", CS_CP866 },
+    { "csIBM866", CS_CP866 },
+
     { "windows-1250", CS_CP1250 },
 
     { "windows-1251", CS_CP1251 },
@@ -197,7 +202,7 @@ int charset_from_mimeenc(const char *name)
 	p = name;
 	q = mimeencs[i].name;
 	while (*p || *q) {
-	    if (tolower(*p) != tolower(*q))
+		if (tolower((unsigned char)*p) != tolower((unsigned char)*q))
 		break;
 	    p++; q++;
 	}