X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=tests%2Ftest-stp.c;h=ce9decc8d87b2fbb4ffecc96aa017ba4da11e187;hb=ff8decf1a318b4a611cb08bb3f12833044e8a872;hp=c2a58377cb773512c6ef78d6eec57e6401d65262;hpb=34e63086edddcae06d7c1a4fa84fec0861e50758;p=openvswitch

diff --git a/tests/test-stp.c b/tests/test-stp.c
index c2a58377..ce9decc8 100644
--- a/tests/test-stp.c
+++ b/tests/test-stp.c
@@ -501,7 +501,8 @@ main(int argc, char *argv[])
 
                         if (!strcmp(token, "0")) {
                             lan = NULL;
-                        } else if (strlen(token) == 1 && islower(*token)) {
+                        } else if (strlen(token) == 1
+                                && islower((unsigned char)*token)) {
                             lan = tc->lans[*token - 'a']; 
                         } else {
                             err("%s is not a valid LAN name "