diff -urN a/src/wl/sys/wl_iw.h b/src/wl/sys/wl_iw.h
--- a/src/wl/sys/wl_iw.h	2013-08-01 09:52:22.000000000 +0300
+++ b/src/wl/sys/wl_iw.h	2013-09-27 09:36:07.808067913 +0300
@@ -21,6 +21,7 @@
 #ifndef _wl_iw_h_
 #define _wl_iw_h_
 
+#include <linux/semaphore.h>
 #include <linux/wireless.h>
 
 #include <typedefs.h>