diff --git a/python-api-src/lib_unittype.cpp b/python-api-src/lib_unittype.cpp
index b8aa24de470d04b5de1f08b23bb28f18dace4b07..25354d8bfe7adb2f51cfc23c0be1b9aaf506b4c5 100644
--- a/python-api-src/lib_unittype.cpp
+++ b/python-api-src/lib_unittype.cpp
@@ -12,7 +12,7 @@ void define_unittype(py::module & m)
         .def_property_readonly("race", &UnitType::getRace)
         .def_property_readonly("is_valid", &UnitType::isValid)
         .def_property_readonly("is_building", &UnitType::isBuilding)
-        .def_property_readonly("is_combat_unit", &UnitType::isCombatUnit)
+        .def_property_readonly("is_combat_unit", &UnitType::isCombatUnit, "The unit is not any of the following: worker, supply provider, building, larva, egg")
         .def_property_readonly("is_supply_provider", &UnitType::isSupplyProvider)
         .def_property_readonly("is_resource_depot", &UnitType::isResourceDepot)
         .def_property_readonly("is_refinery", &UnitType::isRefinery)