diff --git a/similar/main/menu.cpp b/similar/main/menu.cpp
index c774121dc..4c26dc572 100644
--- a/similar/main/menu.cpp
+++ b/similar/main/menu.cpp
@@ -25,6 +25,7 @@ COPYRIGHT 1993-1999 PARALLAX SOFTWARE CORPORATION.  ALL RIGHTS RESERVED.
 
 #include <stdio.h>
 #include <string.h>
+#include <SDL.h>
 
 #include "menu.h"
 #include "inferno.h"