diff --git a/src/arch/x86/insts/microldstop.hh b/src/arch/x86/insts/microldstop.hh
index 067e5bd8b3..8ce458b544 100644
--- a/src/arch/x86/insts/microldstop.hh
+++ b/src/arch/x86/insts/microldstop.hh
@@ -39,6 +39,8 @@
 #ifndef __ARCH_X86_INSTS_MICROLDSTOP_HH__
 #define __ARCH_X86_INSTS_MICROLDSTOP_HH__
 
+#include <tuple>
+
 #include "arch/x86/insts/microop.hh"
 #include "arch/x86/insts/microop_args.hh"
 #include "arch/x86/ldstflags.hh"
@@ -89,7 +91,7 @@ class LdStOp : public InstOperands<MemOp, FoldedDataOp, AddrOp>
             Request::FlagsType mem_flags, OpClass op_class) :
     InstOperands<MemOp, FoldedDataOp, AddrOp>(
             mach_inst, mnem, inst_mnem, set_flags, op_class,
-            _data, { _scale, _index, _base, _disp, _segment },
+            { _data, { _scale, _index, _base, _disp, _segment } },
             data_size, address_size, mem_flags | _segment.index)
     {}
 };
@@ -108,7 +110,7 @@ class LdStFpOp : public InstOperands<MemOp, FloatDataOp, AddrOp>
             Request::FlagsType mem_flags, OpClass op_class) :
     InstOperands<MemOp, FloatDataOp, AddrOp>(
             mach_inst, mnem, inst_mnem, set_flags, op_class,
-            _data, { _scale, _index, _base, _disp, _segment },
+            { _data, { _scale, _index, _base, _disp, _segment } },
             data_size, address_size, mem_flags | _segment.index)
     {}
 };
@@ -126,7 +128,7 @@ class MemNoDataOp : public InstOperands<MemOp, AddrOp>
             Request::FlagsType mem_flags, OpClass op_class) :
     InstOperands<MemOp, AddrOp>(
             mach_inst, mnem, inst_mnem, set_flags, op_class,
-            { _scale, _index, _base, _disp, _segment },
+            { { _scale, _index, _base, _disp, _segment } },
             data_size, address_size, mem_flags | _segment.index)
     {}
 };
@@ -148,7 +150,7 @@ class LdStSplitOp :
             Request::FlagsType mem_flags, OpClass op_class) :
     InstOperands<MemOp, FoldedDataLowOp, FoldedDataHiOp, AddrOp>(
             mach_inst, mnem, inst_mnem, set_flags, op_class,
-            data_low, data_hi, { _scale, _index, _base, _disp, _segment },
+            { data_low, data_hi, { _scale, _index, _base, _disp, _segment } },
             data_size, address_size, mem_flags | _segment.index)
     {}
 };
diff --git a/src/arch/x86/insts/microop_args.hh b/src/arch/x86/insts/microop_args.hh
index 3a9cb060e2..f810a740a8 100644
--- a/src/arch/x86/insts/microop_args.hh
+++ b/src/arch/x86/insts/microop_args.hh
@@ -31,6 +31,8 @@
 #include <cstdint>
 #include <sstream>
 #include <string>
+#include <tuple>
+#include <utility>
 
 #include "arch/x86/insts/static_inst.hh"
 #include "arch/x86/regs/int.hh"
@@ -338,13 +340,26 @@ struct AddrOp
 template <typename Base, typename ...Operands>
 class InstOperands : public Base, public Operands...
 {
+  private:
+    using ArgTuple = std::tuple<typename Operands::ArgType...>;
+
+    template <std::size_t ...I, typename ...CTorArgs>
+    InstOperands(std::index_sequence<I...>, ExtMachInst mach_inst,
+            const char *mnem, const char *inst_mnem, uint64_t set_flags,
+            OpClass op_class, GEM5_VAR_USED ArgTuple args,
+            CTorArgs... ctor_args) :
+        Base(mach_inst, mnem, inst_mnem, set_flags, op_class, ctor_args...),
+        Operands(this, std::get<I>(args))...
+    {}
+
   protected:
     template <typename ...CTorArgs>
     InstOperands(ExtMachInst mach_inst, const char *mnem,
             const char *inst_mnem, uint64_t set_flags, OpClass op_class,
-            typename Operands::ArgType... args, CTorArgs... ctor_args) :
-        Base(mach_inst, mnem, inst_mnem, set_flags, op_class, ctor_args...),
-        Operands(this, args)...
+            ArgTuple args, CTorArgs... ctor_args) :
+        InstOperands(std::make_index_sequence<sizeof...(Operands)>{},
+                mach_inst, mnem, inst_mnem, set_flags, op_class,
+                std::move(args), ctor_args...)
     {}
 
     std::string
diff --git a/src/arch/x86/insts/microspecop.hh b/src/arch/x86/insts/microspecop.hh
index 3d2c6318d9..ed78024c04 100644
--- a/src/arch/x86/insts/microspecop.hh
+++ b/src/arch/x86/insts/microspecop.hh
@@ -42,7 +42,7 @@ class MicroHalt : public InstOperands<X86MicroopBase>
         InstOperands<X86MicroopBase>(mach_inst, "halt", inst_mnem,
                 set_flags | (1ULL << StaticInst::IsNonSpeculative) |
                             (1ULL << StaticInst::IsQuiesce),
-                No_OpClass)
+                No_OpClass, {})
     {}
 
     Fault
diff --git a/src/arch/x86/isa/microops/fpop.isa b/src/arch/x86/isa/microops/fpop.isa
index f727fdc88b..dc83362a0d 100644
--- a/src/arch/x86/isa/microops/fpop.isa
+++ b/src/arch/x86/isa/microops/fpop.isa
@@ -92,7 +92,7 @@ def template MicroFpOpConstructor {{
             const char *inst_mnem, uint64_t set_flags,
             uint8_t data_size, int8_t _spm, Args... args) :
         %(base_class)s(mach_inst, "%(mnemonic)s", inst_mnem, set_flags,
-                %(op_class)s, args..., data_size, _spm)
+                %(op_class)s, { args... }, data_size, _spm)
     {
         %(set_reg_idx_arr)s;
         %(constructor)s;
diff --git a/src/arch/x86/isa/microops/limmop.isa b/src/arch/x86/isa/microops/limmop.isa
index b0444b87b9..c1312e6073 100644
--- a/src/arch/x86/isa/microops/limmop.isa
+++ b/src/arch/x86/isa/microops/limmop.isa
@@ -64,7 +64,7 @@ def template MicroLimmOpDeclare {{
                 uint64_t set_flags, Dest _dest,
                 uint64_t _imm, uint8_t data_size) :
         %(base_class)s(mach_inst, "%(mnemonic)s", inst_mnem, set_flags,
-                %(op_class)s, _dest, _imm, data_size, 0)
+                %(op_class)s, { _dest, _imm }, data_size, 0)
     {
         %(set_reg_idx_arr)s;
         %(constructor)s;
diff --git a/src/arch/x86/isa/microops/mediaop.isa b/src/arch/x86/isa/microops/mediaop.isa
index 3effff8357..7577728b71 100644
--- a/src/arch/x86/isa/microops/mediaop.isa
+++ b/src/arch/x86/isa/microops/mediaop.isa
@@ -58,7 +58,7 @@ def template MediaOpDeclare {{
                 uint64_t set_flags, uint8_t src_size, uint8_t dest_size,
                 uint16_t _ext, Args... args) :
             %(base_class)s(mach_inst, "%(mnemonic)s", inst_mnem, set_flags,
-                    %(op_class)s, args..., src_size, dest_size, _ext)
+                    %(op_class)s, { args... }, src_size, dest_size, _ext)
         {
             %(set_reg_idx_arr)s;
             %(constructor)s;
diff --git a/src/arch/x86/isa/microops/regop.isa b/src/arch/x86/isa/microops/regop.isa
index 13b801c03e..0cca5b5c7f 100644
--- a/src/arch/x86/isa/microops/regop.isa
+++ b/src/arch/x86/isa/microops/regop.isa
@@ -79,7 +79,7 @@ def template MicroRegOpDeclare {{
                 uint64_t set_flags, uint8_t data_size, uint16_t _ext,
                 Args... args) :
             %(base_class)s(mach_inst, "%(mnemonic)s", inst_mnem, set_flags,
-                    %(op_class)s, args..., data_size, _ext)
+                    %(op_class)s, { args... }, data_size, _ext)
         {
             %(set_reg_idx_arr)s;
             %(constructor)s;
@@ -102,7 +102,7 @@ def template MicroRegOpBranchDeclare {{
                 uint64_t set_flags, uint8_t data_size, uint16_t _ext,
                 Args... args) :
             %(base_class)s(mach_inst, "%(mnemonic)s", inst_mnem, set_flags,
-                    %(op_class)s, args..., data_size, _ext)
+                    %(op_class)s, { args... }, data_size, _ext)
         {
             %(set_reg_idx_arr)s;
             %(constructor)s;
diff --git a/src/arch/x86/isa/microops/seqop.isa b/src/arch/x86/isa/microops/seqop.isa
index 7b5210152e..5eae7e692f 100644
--- a/src/arch/x86/isa/microops/seqop.isa
+++ b/src/arch/x86/isa/microops/seqop.isa
@@ -43,7 +43,7 @@ def template BrDeclare {{
         %(class_name)s(ExtMachInst mach_inst, const char *inst_mnem,
                 uint64_t set_flags, uint16_t _target, uint8_t _cc) :
             %(base_class)s(mach_inst, "%(mnemonic)s", inst_mnem, set_flags,
-                    %(op_class)s, _target, _cc)
+                    %(op_class)s, { _target }, _cc)
         {
             %(set_reg_idx_arr)s;
             %(constructor)s;
@@ -77,7 +77,7 @@ def template EretDeclare {{
         %(class_name)s(ExtMachInst mach_inst, const char *inst_mnem,
                 uint64_t set_flags, uint8_t _cc) :
             %(base_class)s(mach_inst, "%(mnemonic)s", inst_mnem, set_flags,
-                    %(op_class)s, _cc)
+                    %(op_class)s, {}, _cc)
         {
             %(set_reg_idx_arr)s;
             %(constructor)s;
diff --git a/src/arch/x86/isa/microops/specop.isa b/src/arch/x86/isa/microops/specop.isa
index c5fe5bc0c8..0a720ee0f9 100644
--- a/src/arch/x86/isa/microops/specop.isa
+++ b/src/arch/x86/isa/microops/specop.isa
@@ -75,7 +75,7 @@ def template MicroFaultConstructor {{
             ExtMachInst mach_inst, const char *inst_mnem, uint64_t set_flags,
             Fault _fault, uint8_t _cc) :
         %(base_class)s(mach_inst, "fault", inst_mnem, set_flags, No_OpClass,
-                _fault, _cc)
+                { _fault }, _cc)
     {
         %(set_reg_idx_arr)s;
         %(constructor)s;