diff --git a/src/o3dgc_common_lib/inc/o3dgcTimer.h b/src/o3dgc_common_lib/inc/o3dgcTimer.h
index 303d4f7..826dea3 100644
--- a/src/o3dgc_common_lib/inc/o3dgcTimer.h
+++ b/src/o3dgc_common_lib/inc/o3dgcTimer.h
@@ -28,7 +28,7 @@ THE SOFTWARE.
 
 #ifdef WIN32
 #include <windows.h>
-#elif __MACH__
+#elif defined(__MACH__) && defined (__APPLE__)
 #include <mach/clock.h>
 #include <mach/mach.h>
 #else
@@ -71,7 +71,7 @@ namespace o3dgc
         LARGE_INTEGER m_freq;
 
     };
-#elif __MACH__
+#elif defined(__MACH__) && defined (__APPLE__)
     class Timer
     {
     public: