X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/874572d4197e2a02152ea8c2185df90531b576c3..f3ffd5a24f6e4488505ff1c98bc6512dff5a69ed:/client/cmdlft55xx.c

diff --git a/client/cmdlft55xx.c b/client/cmdlft55xx.c
index 92a00bce..c5a6dd3f 100644
--- a/client/cmdlft55xx.c
+++ b/client/cmdlft55xx.c
@@ -1433,7 +1433,7 @@ int CmdT55xxBruteForce(const char *Cmd) {
 			//The line start with # is comment, skip
 			if( buf[0]=='#' ) continue;
 
-			if (!isxdigit(buf[0])) {
+			if (!isxdigit((unsigned char)buf[0])) {
 				PrintAndLog("File content error. '%s' must include 8 HEX symbols", buf);
 				continue;
 			}