diff --git a/sys/dev/ixgbe/ixgbe_82599.c b/sys/dev/ixgbe/ixgbe_82599.c
index 946b3ed3839f..e92fb1292da2 100644
--- a/sys/dev/ixgbe/ixgbe_82599.c
+++ b/sys/dev/ixgbe/ixgbe_82599.c
@@ -1750,7 +1750,7 @@ s32 ixgbe_fdir_set_input_mask_82599(struct ixgbe_hw *hw,
 	case 0x0000:
 		/* mask VLAN ID */
 		fdirm |= IXGBE_FDIRM_VLANID;
-		/* fall through */
+		/* FALLTHROUGH */
 	case 0x0FFF:
 		/* mask VLAN priority */
 		fdirm |= IXGBE_FDIRM_VLANP;
@@ -2039,7 +2039,7 @@ s32 ixgbe_fdir_add_perfect_filter_82599(struct ixgbe_hw *hw,
 			DEBUGOUT(" Error on src/dst port\n");
 			return IXGBE_ERR_CONFIG;
 		}
-		/* fall through */
+		/* FALLTHROUGH */
 	case IXGBE_ATR_FLOW_TYPE_TCPV4:
 	case IXGBE_ATR_FLOW_TYPE_TUNNELED_TCPV4:
 	case IXGBE_ATR_FLOW_TYPE_UDPV4:
diff --git a/sys/dev/ixgbe/ixgbe_common.c b/sys/dev/ixgbe/ixgbe_common.c
index b66c4be98871..7a39efa7787d 100644
--- a/sys/dev/ixgbe/ixgbe_common.c
+++ b/sys/dev/ixgbe/ixgbe_common.c
@@ -269,7 +269,8 @@ s32 ixgbe_setup_fc_generic(struct ixgbe_hw *hw)
 		if (ret_val != IXGBE_SUCCESS)
 			goto out;
 
-		/* fall through - only backplane uses autoc */
+		/* only backplane uses autoc */
+		/* FALLTHROUGH */
 	case ixgbe_media_type_fiber_fixed:
 	case ixgbe_media_type_fiber_qsfp:
 	case ixgbe_media_type_fiber:
@@ -4756,7 +4757,8 @@ void ixgbe_set_rxpba_generic(struct ixgbe_hw *hw, int num_pb, u32 headroom,
 		rxpktsize <<= IXGBE_RXPBSIZE_SHIFT;
 		for (; i < (num_pb / 2); i++)
 			IXGBE_WRITE_REG(hw, IXGBE_RXPBSIZE(i), rxpktsize);
-		/* fall through - configure remaining packet buffers */
+		/* configure remaining packet buffers */
+		/* FALLTHROUGH */
 	case PBA_STRATEGY_EQUAL:
 		rxpktsize = (pbsize / (num_pb - i)) << IXGBE_RXPBSIZE_SHIFT;
 		for (; i < num_pb; i++)