X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/6148817a7f7c7d934e41dd8ea0329bb97fee5112..3ded0f97d32f91766a5815b6c74ca7c6ebade8bf:/client/cmdhfmf.c

diff --git a/client/cmdhfmf.c b/client/cmdhfmf.c
index d9578af2..5ebf8144 100644
--- a/client/cmdhfmf.c
+++ b/client/cmdhfmf.c
@@ -1089,7 +1089,7 @@ int CmdHF14AMfChk(const char *Cmd)
 
 					if( buf[0]=='#' ) continue;	//The line start with # is comment, skip
 
-					if (!isxdigit(buf[0])){
+					if (!isxdigit((unsigned char)buf[0])){
 						PrintAndLog("File content error. '%s' must include 12 HEX symbols",buf);
 						continue;
 					}