diff --git a/source/game/StarPlayerTech.cpp b/source/game/StarPlayerTech.cpp
index 133f5f7..3f2db05 100644
--- a/source/game/StarPlayerTech.cpp
+++ b/source/game/StarPlayerTech.cpp
@@ -9,9 +9,13 @@ PlayerTech::PlayerTech() {}
 PlayerTech::PlayerTech(Json const& json) {
   m_availableTechs = jsonToStringSet(json.get("availableTechs"));
   m_enabledTechs = jsonToStringSet(json.get("enabledTechs"));
-  m_equippedTechs = jsonToMapKV<HashMap<TechType, String>>(json.get("equippedTechs"), [](Json t) {
-      return TechTypeNames.getLeft(t.toString());
-    }, mem_fn(&Json::toString));
+  auto techDatabase = Root::singleton().techDatabase();
+  for (auto p : json.get("equippedTechs", JsonObject()).iterateObject()) {
+    if (techDatabase->contains(p.second.toString()))
+      m_equippedTechs.set(TechTypeNames.getLeft(p.first), p.second.toString());
+    else
+      Logger::warn("Missing tech '%s' in slot '%s'", p.second.toString(), p.first);
+  }
 }
 
 Json PlayerTech::toJson() const {