X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Fflash%2Fmflash.c;h=5c8ca8c16b46cc6912301c814cc3faa38a2e8999;hp=123d61ce82e1afd5d69f5186a593f8dd7085e7ff;hb=08a890e4aae307d874bd617f4dc742a56f2064a2;hpb=f9d203d1e6656041affc09528ac373a2b32497ee

diff --git a/src/flash/mflash.c b/src/flash/mflash.c
index 123d61ce82..5c8ca8c16b 100644
--- a/src/flash/mflash.c
+++ b/src/flash/mflash.c
@@ -1345,7 +1345,8 @@ COMMAND_HANDLER(mg_bank_cmd)
 	char *str;
 	mflash_bank->rst_pin.num = strtoul(CMD_ARGV[2], &str, 0);
 	if (*str)
-		mflash_bank->rst_pin.port[0] = (uint16_t)tolower(str[0]);
+		mflash_bank->rst_pin.port[0] = (uint16_t)
+				tolower((unsigned)str[0]);
 
 	mflash_bank->target = target;