1 files changed, 1 insertions, 1 deletions

diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c
index b414522f7686..79610b5ce67e 100644
--- a/arch/um/drivers/mconsole_kern.c
+++ b/arch/um/drivers/mconsole_kern.c
@@ -497,7 +497,7 @@ static void mconsole_get_config(int (*get_config)(char *, char *, int,
         }
 
         error = NULL;
-        size = sizeof(default_buf)/sizeof(default_buf[0]);
+        size = ARRAY_SIZE(default_buf);
         buf = default_buf;
 
         while(1){