diff --git a/tim.h b/tim.h
index 87dc20d..9f9b8f4 100644
--- a/tim.h
+++ b/tim.h
@@ -2,7 +2,9 @@
 #define _TIM_H
 
 #include <stdio.h>
+#ifdef _WIN32
 #include <windows.h>
+#endif
 #include <math.h>
 
 #define TIM_OUTPUT_CLUT4	0