X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/putty/blobdiff_plain/6d177721a1a7749eb0d713fc6768fc758a83e2ab..3ab798412da7dbfc26af43a06e92c13a7b9abf43:/charset/localenc.c

diff --git a/charset/localenc.c b/charset/localenc.c
index 4d81f50f..22088877 100644
--- a/charset/localenc.c
+++ b/charset/localenc.c
@@ -102,7 +102,7 @@ int charset_from_localenc(const char *name)
 	p = name;
 	q = localencs[i].name;
 	while (*p || *q) {
-	    if (tolower(*p) != tolower(*q))
+		if (tolower((unsigned char)*p) != tolower((unsigned char)*q))
 		break;
 	    p++; q++;
 	}