diff --git a/sys/dev/ath/if_athioctl.h b/sys/dev/ath/if_athioctl.h
index d2c3b2d7c42..7184a11bade 100644
--- a/sys/dev/ath/if_athioctl.h
+++ b/sys/dev/ath/if_athioctl.h
@@ -106,6 +106,7 @@ struct ath_stats {
 	u_int32_t	ast_ant_txswitch;/* tx antenna switches */
 	u_int32_t	ast_ant_rx[8];	/* rx frames with antenna */
 	u_int32_t	ast_ant_tx[8];	/* tx frames with antenna */
+	u_int32_t	ast_pad[32];
 };
 
 #define	SIOCGATHSTATS	_IOWR('i', 137, struct ifreq)