diff --git a/src/video_display/preview.cpp b/src/video_display/preview.cpp
index 451025e9f..a1aa994b9 100644
--- a/src/video_display/preview.cpp
+++ b/src/video_display/preview.cpp
@@ -116,6 +116,7 @@ static void show_help(){
 
 static void *display_preview_init(struct module *parent, const char *fmt, unsigned int flags)
 {
+        UNUSED(flags);
         struct state_preview_display *s;
 
         s = new state_preview_display();