diff --git a/simgear/screen/RenderTexture.h b/simgear/screen/RenderTexture.h
index c8377d11..9bf4402f 100644
--- a/simgear/screen/RenderTexture.h
+++ b/simgear/screen/RenderTexture.h
@@ -48,7 +48,7 @@
  */
 #include <simgear/compiler.h>
 
-#ifndef _WIN32
+#if !defined( _WIN32 ) && !defined( __APPLE__ )
 #  include <X11/Xlib.h>
 #endif
 #include SG_GL_H