diff --git a/rpcs3/Emu/Cell/SPUCommonRecompiler.cpp b/rpcs3/Emu/Cell/SPUCommonRecompiler.cpp
index e11cc7a817..ae1d5bd889 100644
--- a/rpcs3/Emu/Cell/SPUCommonRecompiler.cpp
+++ b/rpcs3/Emu/Cell/SPUCommonRecompiler.cpp
@@ -842,6 +842,7 @@ void spu_cache::initialize(bool build_existing_cache)
 		// Initialize compiler instances for parallel compilation
 		std::unique_ptr<spu_recompiler_base> compiler;
 
+#if defined(ARCH_X64)
 		if (g_cfg.core.spu_decoder == spu_decoder_type::asmjit)
 		{
 			compiler = spu_recompiler_base::make_asmjit_recompiler();
@@ -850,6 +851,22 @@ void spu_cache::initialize(bool build_existing_cache)
 		{
 			compiler = spu_recompiler_base::make_llvm_recompiler();
 		}
+		else
+		{
+			fmt::throw_exception("Unsupported spu decoder '%s'", g_cfg.core.spu_decoder);
+		}
+#elif defined(ARCH_ARM64)
+		if (g_cfg.core.spu_decoder == spu_decoder_type::llvm)
+		{
+			compiler = spu_recompiler_base::make_llvm_recompiler();
+		}
+		else
+		{
+			fmt::throw_exception("Unsupported spu decoder '%s'", g_cfg.core.spu_decoder);
+		}
+#else
+#error "Unimplemented"
+#endif
 
 		compiler->init();
 
@@ -2545,7 +2562,7 @@ bool reg_state_t::is_const() const
 
 bool reg_state_t::compare_tags(const reg_state_t& rhs) const
 {
-	// Compare by tag, address of instruction origin 
+	// Compare by tag, address of instruction origin
 	return tag == rhs.tag && origin == rhs.origin && is_instruction == rhs.is_instruction;
 }
 
@@ -6066,7 +6083,7 @@ spu_program spu_recompiler_base::analyse(const be_t<u32>* ls, u32 entry_point, s
 									else if (atomic16->ls_offs.compare_with_mask_indifference(atomic16->lsa, SPU_LS_MASK_128) && atomic16->ls.is_less_than(128 - (atomic16->ls_offs.value & 127)))
 									{
 										// Relative memory access with offset less than 128 bytes
-										// Common around SPU utilities which have less strict restrictions about memory alignment 
+										// Common around SPU utilities which have less strict restrictions about memory alignment
 										ok = true;
 									}
 								}
@@ -6340,7 +6357,7 @@ spu_program spu_recompiler_base::analyse(const be_t<u32>* ls, u32 entry_point, s
 			{
 				atomic16->mem_count++;
 
-				// Do not clear lower 16 bytes addressing because the program can move on 4-byte basis 
+				// Do not clear lower 16 bytes addressing because the program can move on 4-byte basis
 				const u32 offs = spu_branch_target(pos - result.lower_bound, op.si16);
 
 				if (atomic16->lsa.is_const() && [&]()
@@ -8142,7 +8159,7 @@ std::array<reg_state_t, s_reg_max>& block_reg_info::evaluate_start_state(const s
 					// Check if the node is resolved
 					if (!node->has_true_state)
 					{
-						// Assume this block cannot be resolved at the moment 
+						// Assume this block cannot be resolved at the moment
 						is_all_resolved = false;
 						break;
 					}
diff --git a/rpcs3/Emu/Cell/SPUThread.cpp b/rpcs3/Emu/Cell/SPUThread.cpp
index e4285e8071..9ac57fa5c7 100644
--- a/rpcs3/Emu/Cell/SPUThread.cpp
+++ b/rpcs3/Emu/Cell/SPUThread.cpp
@@ -2142,20 +2142,31 @@ spu_thread::spu_thread(lv2_spu_group* group, u32 index, std::string_view name, u
 	, lv2_id(lv2_id)
 	, spu_tname(make_single<std::string>(name))
 {
+#if defined(ARCH_X64)
 	if (g_cfg.core.spu_decoder == spu_decoder_type::asmjit)
 	{
 		jit = spu_recompiler_base::make_asmjit_recompiler();
 	}
 	else if (g_cfg.core.spu_decoder == spu_decoder_type::llvm)
 	{
-#if defined(ARCH_X64)
 		jit = spu_recompiler_base::make_fast_llvm_recompiler();
+	}
+	else
+	{
+		fmt::throw_exception("Unsupported spu decoder '%s'", g_cfg.core.spu_decoder);
+	}
 #elif defined(ARCH_ARM64)
+	if (g_cfg.core.spu_decoder == spu_decoder_type::llvm)
+	{
 		jit = spu_recompiler_base::make_llvm_recompiler();
+	}
+	else
+	{
+		fmt::throw_exception("Unsupported spu decoder '%s'", g_cfg.core.spu_decoder);
+	}
 #else
 #error "Unimplemented"
 #endif
-	}
 
 	if (g_cfg.core.mfc_debug)
 	{
@@ -2217,20 +2228,31 @@ spu_thread::spu_thread(utils::serial& ar, lv2_spu_group* group)
 	, lv2_id(ar)
 	, spu_tname(make_single<std::string>(ar.operator std::string()))
 {
+#if defined(ARCH_X64)
 	if (g_cfg.core.spu_decoder == spu_decoder_type::asmjit)
 	{
 		jit = spu_recompiler_base::make_asmjit_recompiler();
 	}
 	else if (g_cfg.core.spu_decoder == spu_decoder_type::llvm)
 	{
-#if defined(ARCH_X64)
 		jit = spu_recompiler_base::make_fast_llvm_recompiler();
+	}
+	else
+	{
+		fmt::throw_exception("Unsupported spu decoder '%s'", g_cfg.core.spu_decoder);
+	}
 #elif defined(ARCH_ARM64)
+	if (g_cfg.core.spu_decoder == spu_decoder_type::llvm)
+	{
 		jit = spu_recompiler_base::make_llvm_recompiler();
+	}
+	else
+	{
+		fmt::throw_exception("Unsupported spu decoder '%s'", g_cfg.core.spu_decoder);
+	}
 #else
 #error "Unimplemented"
 #endif
-	}
 
 	if (g_cfg.core.mfc_debug)
 	{
diff --git a/rpcs3/rpcs3qt/settings_dialog.cpp b/rpcs3/rpcs3qt/settings_dialog.cpp
index 77790ac0a0..10fa33c31d 100644
--- a/rpcs3/rpcs3qt/settings_dialog.cpp
+++ b/rpcs3/rpcs3qt/settings_dialog.cpp
@@ -398,6 +398,10 @@ settings_dialog::settings_dialog(std::shared_ptr<gui_settings> gui_settings, std
 	spu_bg->addButton(ui->spu_asmjit,  static_cast<int>(spu_decoder_type::asmjit));
 	spu_bg->addButton(ui->spu_llvm,    static_cast<int>(spu_decoder_type::llvm));
 
+#ifndef ARCH_X64
+	ui->spu_asmjit->setEnabled(false);
+#endif
+
 	connect(spu_bg, &QButtonGroup::idToggled, [this](int id, bool checked)
 	{
 		if (!checked) return;