diff --git a/desktop_version/src/Script.h b/desktop_version/src/Script.h
index 7af1c8e8..e4d07b13 100644
--- a/desktop_version/src/Script.h
+++ b/desktop_version/src/Script.h
@@ -4,7 +4,9 @@
 #include <string>
 #include <vector>
 
-#define filllines(lines) commands.insert(commands.end(), lines, lines + sizeof(lines)/sizeof(lines[0]))
+#include <SDL.h>
+
+#define filllines(lines) commands.insert(commands.end(), lines, lines + SDL_arraysize(lines))
 
 
 struct Script