diff --git a/src/common/objects/dobjgc.h b/src/common/objects/dobjgc.h
index a844a16db..25e27bfb3 100644
--- a/src/common/objects/dobjgc.h
+++ b/src/common/objects/dobjgc.h
@@ -282,6 +282,11 @@ public:
 		return GC::ReadBarrier(o) == u;
 	}
 
+	constexpr bool operator==(TObjPtr<T> u) noexcept
+	{
+		return ForceGet() == u.ForceGet();
+	}
+
 	template<class U> friend inline void GC::Mark(TObjPtr<U> &obj);
 	template<class U> friend FSerializer &Serialize(FSerializer &arc, const char *key, TObjPtr<U> &value, TObjPtr<U> *);
 	template<class U> friend FSerializer &Serialize(FSerializer &arc, const char *key, TObjPtr<U> &value, U *);
diff --git a/src/common/utility/geometry.h b/src/common/utility/geometry.h
index cbe0fc72d..e6b19db38 100644
--- a/src/common/utility/geometry.h
+++ b/src/common/utility/geometry.h
@@ -232,3 +232,4 @@ inline bool BoxInRange(const DVector2& boxtl, const DVector2& boxbr, const DVect
 		boxtl.Y < max(start.Y, end.Y) &&
 		boxbr.Y > min(start.Y, end.Y);
 }
+
diff --git a/src/common/utility/tarray.h b/src/common/utility/tarray.h
index 760dd6092..e60772688 100644
--- a/src/common/utility/tarray.h
+++ b/src/common/utility/tarray.h
@@ -455,6 +455,13 @@ public:
 		return start;
 	}
 
+	unsigned AddUnique(const T& obj)
+	{
+		auto f = Find(obj);
+		if (f == Size()) Push(obj);
+		return f;
+	}
+
 	bool Pop ()
 	{
 		if (Count > 0)