diff --git a/drivers/net/wireless/iwlwifi/iwl-mac80211.c b/drivers/net/wireless/iwlwifi/iwl-mac80211.c
index 0136803..a0b0b78 100644
--- a/drivers/net/wireless/iwlwifi/iwl-mac80211.c
+++ b/drivers/net/wireless/iwlwifi/iwl-mac80211.c
@@ -1343,6 +1343,20 @@ static int iwlagn_mac_add_interface(struct ieee80211_hw *hw,
 	vif_priv->ctx = ctx;
 	ctx->vif = vif;
 
+	/*
+	 * In SNIFFER device type, the firmware reports the FCS to
+	 * the host, rather than snipping it off. Unfortunately,
+	 * mac80211 doesn't (yet) provide a per-packet flag for
+	 * this, so that we have to set the hardware flag based
+	 * on the interfaces added. As the monitor interface can
+	 * only be present by itself, and will be removed before
+	 * other interfaces are added, this is safe.
+	 */
+	if (vif->type == NL80211_IFTYPE_MONITOR)
+		priv->hw->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
+	else
+		priv->hw->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
+
 	err = iwl_setup_interface(priv, ctx);
 	if (!err || reset)
 		goto out;