diff --git a/Assembly.cpp b/Assembly.cpp
index 1d9cb4bcb..c0dc6fd5e 100644
--- a/Assembly.cpp
+++ b/Assembly.cpp
@@ -213,7 +213,10 @@ void Assembly::optimise()
 	std::vector<pair<AssemblyItems, function<AssemblyItems(AssemblyItemsConstRef)>>> rules =
 	{
 		{ { Push, Instruction::POP }, [](AssemblyItemsConstRef) -> AssemblyItems { return {}; } },
+		{ { PushTag, Instruction::POP }, [](AssemblyItemsConstRef) -> AssemblyItems { return {}; } },
+		{ { PushString, Instruction::POP }, [](AssemblyItemsConstRef) -> AssemblyItems { return {}; } },
 		{ { Push, PushTag, Instruction::JUMPI }, [](AssemblyItemsConstRef m) -> AssemblyItems { if (m[0].data()) return { m[1], Instruction::JUMP }; else return {}; } },
+		{ { Instruction::NOT, Instruction::NOT }, [](AssemblyItemsConstRef) -> AssemblyItems { return {}; } },
 	};
 
 	for (auto const& i: c_simple)