diff --git a/debugdraw.c b/debugdraw.c
index 44cd5fb..5ae2843 100644
--- a/debugdraw.c
+++ b/debugdraw.c
@@ -27,8 +27,15 @@ typedef struct Command
 
 // thread local variables so debug drawing in server thread
 // doesn't fuck up main thread
-static __declspec(thread) Command commands[MAX_COMMANDS] = {0};
-static __declspec(thread) int command_i = 0;
+
+#if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
+#define THREADLOCAL __declspec(thread) 
+#else
+#define THREADLOCAL __thread
+#endif
+
+static THREADLOCAL Command commands[MAX_COMMANDS] = {0};
+static THREADLOCAL int command_i = 0;
 
 void dbg_drawall()
 {