1 files changed, 5 insertions, 2 deletions

diff --git a/uisimulator/common/io.c b/uisimulator/common/io.c
index f77180dc21..0d680e0e8a 100644
--- a/uisimulator/common/io.c
+++ b/uisimulator/common/io.c
@@ -46,9 +46,12 @@
 #endif
 
 #include <fcntl.h>
-#include <SDL.h>
-#include <SDL_thread.h>
+#ifdef HAVE_SDL_THREADS
 #include "thread-sdl.h"
+#else
+#define sim_thread_unlock() NULL
+#define sim_thread_lock(a)
+#endif
 #include "thread.h"
 #include "kernel.h"
 #include "debug.h"