1 files changed, 1 insertions, 1 deletions

diff --git a/usr.sbin/usbd/usbd.c b/usr.sbin/usbd/usbd.c
index 85230af50dc9..3749048cf9c9 100644
--- a/usr.sbin/usbd/usbd.c
+++ b/usr.sbin/usbd/usbd.c
@@ -448,7 +448,7 @@ read_configuration(void)
 		}
 
 		/* skip initial spaces */
-		while (*line != '\0' && isspace(*line)) {
+		while (len > 0 && isspace(*line)) {
 			line++;
 			len--;
 		}