diff --git a/drivers/net/wireless/libertas/if_spi.c b/drivers/net/wireless/libertas/if_spi.c
index bf4bfbae622..3ea03f259ee 100644
--- a/drivers/net/wireless/libertas/if_spi.c
+++ b/drivers/net/wireless/libertas/if_spi.c
@@ -23,6 +23,7 @@
 #include <linux/kthread.h>
 #include <linux/list.h>
 #include <linux/netdevice.h>
+#include <linux/semaphore.h>
 #include <linux/spi/libertas_spi.h>
 #include <linux/spi/spi.h>