diff --git a/sys/dev/mlx5/device.h b/sys/dev/mlx5/device.h
index 904b6d7c0a81..07d753cea19d 100644
--- a/sys/dev/mlx5/device.h
+++ b/sys/dev/mlx5/device.h
@@ -549,6 +549,7 @@ enum {
 	MLX5_MODULE_EVENT_ERROR_UNSUPPORTED_CABLE                     = 0x5,
 	MLX5_MODULE_EVENT_ERROR_HIGH_TEMPERATURE                      = 0x6,
 	MLX5_MODULE_EVENT_ERROR_CABLE_IS_SHORTED                      = 0x7,
+	MLX5_MODULE_EVENT_ERROR_PCIE_SYSTEM_POWER_SLOT_EXCEEDED       = 0xc,
 };
 
 struct mlx5_eqe_port_module_event {
diff --git a/sys/dev/mlx5/mlx5_core/mlx5_eq.c b/sys/dev/mlx5/mlx5_core/mlx5_eq.c
index c972d27e8dd5..faa56515d499 100644
--- a/sys/dev/mlx5/mlx5_core/mlx5_eq.c
+++ b/sys/dev/mlx5/mlx5_core/mlx5_eq.c
@@ -615,6 +615,12 @@ static const char *mlx5_port_module_event_error_type_to_string(u8 error_type)
 		return "High Temperature";
 	case MLX5_MODULE_EVENT_ERROR_CABLE_IS_SHORTED:
 		return "Cable is shorted";
+	case MLX5_MODULE_EVENT_ERROR_PCIE_SYSTEM_POWER_SLOT_EXCEEDED:
+		return "One or more network ports have been powered "
+			"down due to insufficient/unadvertised power on "
+			"the PCIe slot. Please refer to the card's user "
+			"manual for power specifications or contact "
+			"Mellanox support.";
 
 	default:
 		return "Unknown error type";