diff --git a/InstructionSets/M68k/Instruction.hpp b/InstructionSets/M68k/Instruction.hpp
index ce211dbec..314729f8d 100644
--- a/InstructionSets/M68k/Instruction.hpp
+++ b/InstructionSets/M68k/Instruction.hpp
@@ -104,9 +104,9 @@ enum class Operation: uint8_t {
 	Max = RESET
 };
 
-template <Model model, Operation t_op = Operation::Undefined>
-constexpr bool requires_supervisor(Operation r_op = Operation::Undefined) {
-	switch(t_op != Operation::Undefined ? t_op : r_op) {
+template <Model model>
+constexpr bool requires_supervisor(Operation op) {
+	switch(op) {
 		case Operation::MOVEfromSR:
 			if constexpr (model == Model::M68000) {
 				return false;