diff --git a/sysdeps/unix/sysv/linux/sysconf.c b/sysdeps/unix/sysv/linux/sysconf.c
index 41319b19ac..daaeeb7d36 100644
--- a/sysdeps/unix/sysv/linux/sysconf.c
+++ b/sysdeps/unix/sysv/linux/sysconf.c
@@ -35,7 +35,7 @@
 
 /* Newer kernels (4.13) limit the maximum command line arguments lengths to
    6MiB.  */
-#define maximum_ARG_MAX 6291456
+#define maximum_ARG_MAX (6 * 1024 * 1024)
 
 static long int posix_sysconf (int name);