diff --git a/drivers/net/wireless/ath/ath9k/hw.c b/drivers/net/wireless/ath/ath9k/hw.c
index d0a0acd15d46..ce4891ea4889 100644
--- a/drivers/net/wireless/ath/ath9k/hw.c
+++ b/drivers/net/wireless/ath/ath9k/hw.c
@@ -408,7 +408,7 @@ static void ath9k_hw_init_defaults(struct ath_hw *ah)
 		AR_STA_ID1_CRPT_MIC_ENABLE |
 		AR_STA_ID1_MCAST_KSRCH;
 	ah->enable_32kHz_clock = DONT_USE_32KHZ;
-	ah->slottime = (u32) -1;
+	ah->slottime = 20;
 	ah->globaltxtimeout = (u32) -1;
 	ah->power_mode = ATH9K_PM_UNDEFINED;
 }