diff --git a/app/src/server.c b/app/src/server.c
index 94881e51..fa9230e0 100644
--- a/app/src/server.c
+++ b/app/src/server.c
@@ -234,7 +234,7 @@ execute_server(struct server *server, const struct server_params *params) {
     char max_size_string[6];
     char bit_rate_string[11];
     char max_fps_string[6];
-    char lock_video_orientation_string[3];
+    char lock_video_orientation_string[5];
     char display_id_string[6];
     sprintf(max_size_string, "%"PRIu16, params->max_size);
     sprintf(bit_rate_string, "%"PRIu32, params->bit_rate);