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-rw-r--r--applets/applet_tables.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/applets/applet_tables.c b/applets/applet_tables.c
index 7ba929b..66ef7e4 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++;
}