1 files changed, 3 insertions, 2 deletions

diff --git a/util-linux/mdev.c b/util-linux/mdev.c
index bf07aebb3..a32c04f6b 100644
--- a/util-linux/mdev.c
+++ b/util-linux/mdev.c
@@ -180,8 +180,9 @@ static void make_device(char *path, int delete)
                                 /* substitute %1..9 with off[1..9], if any */
                                 n = 0;
                                 s = val;
-                                while (*s && *s++ == '%')
-                                        n++;
+                                while (*s)
+                                        if (*s++ == '%')
+                                                n++;
 
                                 p = alias = xzalloc(strlen(val) + n * strlen(device_name));
                                 s = val + 1;