diff --git a/scst/src/dev_handlers/scst_user.c b/scst/src/dev_handlers/scst_user.c
index 53ed9131c..b83f4e354 100644
--- a/scst/src/dev_handlers/scst_user.c
+++ b/scst/src/dev_handlers/scst_user.c
@@ -2765,7 +2765,7 @@ static void dev_user_setup_functions(struct scst_user_dev *dev)
 
 static int dev_user_check_version(const struct scst_user_dev_desc *dev_desc)
 {
-	char str[max(sizeof(DEV_USER_VERSION)+1, 20U)];
+	char str[max_t(int, sizeof(DEV_USER_VERSION)+1, 20)];
 	int res = 0, rc;
 
 	rc = copy_from_user(str,