diff --git a/src/TechTreeImproved.cpp b/src/TechTreeImproved.cpp
index 14ef7d55b3918ef3663bae426f41caf122be0ebc..ab0a36b963bbc4a5b39949817a9f6659e4c2e283 100644
--- a/src/TechTreeImproved.cpp
+++ b/src/TechTreeImproved.cpp
@@ -216,7 +216,6 @@ bool TechTreeImproved::LoadData() {
 
 const std::vector<BuildDescription> & TechTreeImproved::HowToBuild(sc2::UnitTypeID unit) const
 {
-    sc2::UNIT_TYPEID unit_id = static_cast<sc2::UNIT_TYPEID>(unit);
     if (result_to_data.count(unit) > 0)
     {
         return result_to_data.at(unit);