diff --git a/BuildingClass.h b/BuildingClass.h
index 5bbb0d6c..56bfbe7c 100644
--- a/BuildingClass.h
+++ b/BuildingClass.h
@@ -47,6 +47,8 @@ class NOVTABLE BuildingClass : public TechnoClass
 	virtual int	Size() const R0;
 
 	//ObjectClass
+	virtual void Flash(int duration) override JMP_THIS(0x6F9DD0);
+
 	//MissionClass
 	//TechnoClass
 	virtual void Destroyed(ObjectClass* Killer) RX;
diff --git a/TechnoClass.h b/TechnoClass.h
index 75d1b061..d0e2572f 100644
--- a/TechnoClass.h
+++ b/TechnoClass.h
@@ -196,6 +196,9 @@ class NOVTABLE TechnoClass : public RadioClass
 	//ObjectClass
 	virtual bool Limbo() override JMP_THIS(0x6F6AC0);
 
+	virtual void Flash(int duration) override JMP_THIS(0x6F9DD0);
+	virtual bool Select() override JMP_THIS(0x6FBFA0);
+
 	//TechnoClass
 	virtual bool IsUnitFactory() const R0;
 	virtual bool IsCloakable() const R0;