X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/charset/blobdiff_plain/36eb75644933f0cfb984f0509966a4015b93874c..273ef1a19b9f44a1dbe4365e66d854879415ff5a:/mimeenc.c

diff --git a/mimeenc.c b/mimeenc.c
index e0ace12..d3471d0 100644
--- a/mimeenc.c
+++ b/mimeenc.c
@@ -323,7 +323,7 @@ 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++;
 	}