diff --git a/drivers/net/wireless/libertas/if_sdio.c b/drivers/net/wireless/libertas/if_sdio.c
index 6e71346a7550..382f2371a1ab 100644
--- a/drivers/net/wireless/libertas/if_sdio.c
+++ b/drivers/net/wireless/libertas/if_sdio.c
@@ -126,7 +126,7 @@ struct if_sdio_card {
 	const char		*helper;
 	const char		*firmware;
 
-	u8			buffer[65536];
+	u8			buffer[65536] __attribute__((aligned(4)));
 
 	spinlock_t		lock;
 	struct if_sdio_packet	*packets;