--- a/neo/sys/threads.cpp	2022-05-28 19:48:39.534035552 +0100
+++ b/neo/sys/threads.cpp	2022-05-28 19:52:42.599278454 +0100
@@ -45,7 +45,11 @@ static xthreadInfo	*thread[MAX_THREADS]
 static size_t		thread_count = 0;
 
 static bool mainThreadIDset = false;
+#if SDL_VERSION_ATLEAST(2, 0, 0)
 static SDL_threadID mainThreadID = -1;
+#else
+static Uint32 mainThreadID = -1;
+#endif
 
 /*
 ==============