diff --git a/drivers/net/wireless/iwlwifi/iwl-3945-led.h b/drivers/net/wireless/iwlwifi/iwl-3945-led.h
index 6463e6e34aaa..47b7e0bac802 100644
--- a/drivers/net/wireless/iwlwifi/iwl-3945-led.h
+++ b/drivers/net/wireless/iwlwifi/iwl-3945-led.h
@@ -54,7 +54,7 @@ struct iwl3945_led {
 	int (*led_on) (struct iwl3945_priv *priv, int led_id);
 	int (*led_off) (struct iwl3945_priv *priv, int led_id);
 	int (*led_pattern) (struct iwl3945_priv *priv, int led_id,
-			    int idx);
+			    unsigned int idx);
 
 	enum led_type type;
 	unsigned int registered;
diff --git a/drivers/net/wireless/iwlwifi/iwl-led.c b/drivers/net/wireless/iwlwifi/iwl-led.c
index 0c09b901a253..899d7a2567a8 100644
--- a/drivers/net/wireless/iwlwifi/iwl-led.c
+++ b/drivers/net/wireless/iwlwifi/iwl-led.c
@@ -106,7 +106,8 @@ static int iwl_send_led_cmd(struct iwl_priv *priv, struct iwl_led_cmd *led_cmd)
 }
 
 /* Set led pattern command */
-static int iwl4965_led_pattern(struct iwl_priv *priv, int led_id, int idx)
+static int iwl4965_led_pattern(struct iwl_priv *priv, int led_id,
+			       unsigned int idx)
 {
 	struct iwl_led_cmd led_cmd = {
 		.id = led_id,
diff --git a/drivers/net/wireless/iwlwifi/iwl-led.h b/drivers/net/wireless/iwlwifi/iwl-led.h
index 05e6a6113b74..1980ae5a7e82 100644
--- a/drivers/net/wireless/iwlwifi/iwl-led.h
+++ b/drivers/net/wireless/iwlwifi/iwl-led.h
@@ -55,7 +55,7 @@ struct iwl_led {
 
 	int (*led_on) (struct iwl_priv *priv, int led_id);
 	int (*led_off) (struct iwl_priv *priv, int led_id);
-	int (*led_pattern) (struct iwl_priv *priv, int led_id, int idx);
+	int (*led_pattern) (struct iwl_priv *priv, int led_id, unsigned int idx);
 
 	enum led_type type;
 	unsigned int registered;