1 files changed, 1 insertions, 1 deletions

diff --git a/util-linux/mdev.c b/util-linux/mdev.c
index b2d56575f..ccc00d365 100644
--- a/util-linux/mdev.c
+++ b/util-linux/mdev.c
@@ -610,7 +610,7 @@ static void make_device(char *device_name, char *path, int operation)
          * We use strstr("/block/") to forestall future surprises.
          */
         type = S_IFCHR;
-        if (strstr(path, "/block/") || (G.subsystem && strncmp(G.subsystem, "block", 5) == 0))
+        if (strstr(path, "/block/") || (G.subsystem && is_prefixed_with(G.subsystem, "block")))
                 type = S_IFBLK;
 
 #if ENABLE_FEATURE_MDEV_CONF