X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Ftap%2Ftap.c;h=9f6d4d066a4e7068d16bc05659cb47fd680b3f6b;hp=6d3ba0db18923a3eadacdad294cbe1d38ef69884;hb=1313203b72656e8480805c7688c187d274fdceeb;hpb=39dc9e4612339af669e934c47500605f826a2bb4

diff --git a/ccan/tap/tap.c b/ccan/tap/tap.c
index 6d3ba0db..9f6d4d06 100644
--- a/ccan/tap/tap.c
+++ b/ccan/tap/tap.c
@@ -115,7 +115,8 @@ _gen_result(int ok, const char *func, const char *file, unsigned int line,
 		if(local_test_name) {
 			name_is_digits = 1;
 			for(c = local_test_name; *c != '\0'; c++) {
-				if(!isdigit(*c) && !isspace(*c)) {
+				if(!isdigit((unsigned char)*c)
+				   && !isspace((unsigned char)*c)) {
 					name_is_digits = 0;
 					break;
 				}