diff --git a/sys/dev/ath/if_athvar.h b/sys/dev/ath/if_athvar.h
index 3343cd05ac78..b38369b4ec8b 100644
--- a/sys/dev/ath/if_athvar.h
+++ b/sys/dev/ath/if_athvar.h
@@ -47,7 +47,7 @@
  * 802.11n requires more TX and RX buffers to do AMPDU.
  */
 #ifdef	ATH_ENABLE_11N
-#define	ATH_TXBUF	512
+#define	ATH_TXBUF	128
 #define	ATH_RXBUF	512
 #endif