X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/330f65fbaf09945926c8bce6e7bb81ef529a3ef5..940b282f5482842b17865703ef5c9d53e7abec5d:/client/reveng/model.c

diff --git a/client/reveng/model.c b/client/reveng/model.c
index 2d45b2fe..5a9b6580 100644
--- a/client/reveng/model.c
+++ b/client/reveng/model.c
@@ -596,7 +596,7 @@ mbynam(model_t *dest, const char *key) {
 		uerror("cannot allocate memory for comparison string");
 	akey.name = uptr = ukey;
 	do
-		*uptr++ = toupper(*key);
+		*uptr++ = toupper((unsigned char)*key);
 	while(*key++);
 
 	aptr = bsearch(&akey, aliases, NALIASES, sizeof(struct malias), (int (*)(const void *, const void *)) &acmp);