Merge branch 'busybox' into merge

1 files changed, 1 insertions, 1 deletions

diff --git a/applets/applet_tables.c b/applets/applet_tables.c
index b1dafccd2..fe26a5109 100644
--- a/applets/applet_tables.c
+++ b/applets/applet_tables.c
@@ -56,7 +56,7 @@ static int cmp_name(const void *a, const void *b)
 static int str_isalnum_(const char *s)
 {
         while (*s) {
-                if (!isalnum(*s) && *s != '_')
+                if (!isalnum((unsigned char)*s) && *s != '_')
                         return 0;
                 s++;
         }