diff --git a/projects/rfdsatt/rfdsatt.c b/projects/rfdsatt/rfdsatt.c
index 8a9817a..68a6f14 100644
--- a/projects/rfdsatt/rfdsatt.c
+++ b/projects/rfdsatt/rfdsatt.c
@@ -153,7 +153,7 @@ DEFUN(reset, reset_cmd, "reset", "Reset the board")
 
 DEFUN(uuid, uuid_cmd, "uuid", "Get the unique ID")
 {
-	char uuid[4*3+1];
+	char uuid[4*3*2+1];
 	desig_get_unique_id_as_string(uuid, sizeof(uuid));
 	printf("UUID: %s\r\n", uuid);
 }
@@ -190,7 +190,7 @@ DEFUN(att_set, att_set_cmd, "attenuator-set",
 
 static void print_banner(void)
 {
-	char uuid[4*3+1];
+	char uuid[4*3*2+1];
 	desig_get_unique_id_as_string(uuid, sizeof(uuid));
 
 	printf("\r\n======================================================================\r\n");