diff --git a/drivers/net/wireless/rt2x00/rt2x00mac.c b/drivers/net/wireless/rt2x00/rt2x00mac.c
index 485c40de5cc0448f02cd93aa78790696c55cfbf2..2c6cc5c374ff3be765b681e07d17fede815a3d22 100644
--- a/drivers/net/wireless/rt2x00/rt2x00mac.c
+++ b/drivers/net/wireless/rt2x00/rt2x00mac.c
@@ -543,7 +543,8 @@ int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
 	 * provided but key 0 is not, then the key is not found
 	 * by the hardware during RX).
 	 */
-	key->hw_key_idx = 0;
+	if (cmd == SET_KEY)
+		key->hw_key_idx = 0;
 
 	if (key->flags & IEEE80211_KEY_FLAG_PAIRWISE)
 		set_key = rt2x00dev->ops->lib->config_pairwise_key;
diff --git a/drivers/net/wireless/rt2x00/rt61pci.c b/drivers/net/wireless/rt2x00/rt61pci.c
index 2c36b91ff4c79da5525e6163c604fbdd22f6a65b..a461620b489f0350536bb06148e2813c609ea77f 100644
--- a/drivers/net/wireless/rt2x00/rt61pci.c
+++ b/drivers/net/wireless/rt2x00/rt61pci.c
@@ -381,7 +381,7 @@ static int rt61pci_config_shared_key(struct rt2x00_dev *rt2x00dev,
 		if (reg && reg == mask)
 			return -ENOSPC;
 
-		key->hw_key_idx += reg ? (ffz(reg) - 1) : 0;
+		key->hw_key_idx += reg ? ffz(reg) : 0;
 
 		/*
 		 * Upload key to hardware
@@ -477,7 +477,7 @@ static int rt61pci_config_pairwise_key(struct rt2x00_dev *rt2x00dev,
 				return -ENOSPC;
 		}
 
-		key->hw_key_idx += reg ? (ffz(reg) - 1) : 0;
+		key->hw_key_idx += reg ? ffz(reg) : 0;
 
 		/*
 		 * Upload key to hardware
diff --git a/drivers/net/wireless/rt2x00/rt73usb.c b/drivers/net/wireless/rt2x00/rt73usb.c
index 27dde3e34603705a5fdc56cdf1a5fe8fbc8debd4..934f8e03c5aae99fa9f6175d0c509d48fc245a48 100644
--- a/drivers/net/wireless/rt2x00/rt73usb.c
+++ b/drivers/net/wireless/rt2x00/rt73usb.c
@@ -393,7 +393,7 @@ static int rt73usb_config_shared_key(struct rt2x00_dev *rt2x00dev,
 		if (reg && reg == mask)
 			return -ENOSPC;
 
-		key->hw_key_idx += reg ? (ffz(reg) - 1) : 0;
+		key->hw_key_idx += reg ? ffz(reg) : 0;
 
 		/*
 		 * Upload key to hardware
@@ -494,7 +494,7 @@ static int rt73usb_config_pairwise_key(struct rt2x00_dev *rt2x00dev,
 				return -ENOSPC;
 		}
 
-		key->hw_key_idx += reg ? (ffz(reg) - 1) : 0;
+		key->hw_key_idx += reg ? ffz(reg) : 0;
 
 		/*
 		 * Upload key to hardware