diff --git a/Source/Project64-core/N64System/Recompiler/Aarch64/Aarch64RecompilerOps.cpp b/Source/Project64-core/N64System/Recompiler/Aarch64/Aarch64RecompilerOps.cpp
index f7314c5a2..6c46824e5 100644
--- a/Source/Project64-core/N64System/Recompiler/Aarch64/Aarch64RecompilerOps.cpp
+++ b/Source/Project64-core/N64System/Recompiler/Aarch64/Aarch64RecompilerOps.cpp
@@ -144,6 +144,11 @@ void CAarch64RecompilerOps::LDR()
     g_Notify->BreakPoint(__FILE__, __LINE__);
 }
 
+void CAarch64RecompilerOps::RESERVED31()
+{
+    g_Notify->BreakPoint(__FILE__, __LINE__);
+}
+
 void CAarch64RecompilerOps::LB()
 {
     g_Notify->BreakPoint(__FILE__, __LINE__);
diff --git a/Source/Project64-core/N64System/Recompiler/Aarch64/Aarch64RecompilerOps.h b/Source/Project64-core/N64System/Recompiler/Aarch64/Aarch64RecompilerOps.h
index b03aca356..572c32b00 100644
--- a/Source/Project64-core/N64System/Recompiler/Aarch64/Aarch64RecompilerOps.h
+++ b/Source/Project64-core/N64System/Recompiler/Aarch64/Aarch64RecompilerOps.h
@@ -50,6 +50,7 @@ public:
     void DADDIU();
     void LDL();
     void LDR();
+    void RESERVED31();
     void LB();
     void LH();
     void LWL();
diff --git a/Source/Project64-core/N64System/Recompiler/Arm/ArmRecompilerOps.cpp b/Source/Project64-core/N64System/Recompiler/Arm/ArmRecompilerOps.cpp
index 7c6e1a33e..f07d27ff9 100644
--- a/Source/Project64-core/N64System/Recompiler/Arm/ArmRecompilerOps.cpp
+++ b/Source/Project64-core/N64System/Recompiler/Arm/ArmRecompilerOps.cpp
@@ -145,6 +145,11 @@ void CArmRecompilerOps::LDR()
     g_Notify->BreakPoint(__FILE__, __LINE__);
 }
 
+void CArmRecompilerOps::RESERVED31()
+{
+    g_Notify->BreakPoint(__FILE__, __LINE__);
+}
+
 void CArmRecompilerOps::LB()
 {
     g_Notify->BreakPoint(__FILE__, __LINE__);
diff --git a/Source/Project64-core/N64System/Recompiler/Arm/ArmRecompilerOps.h b/Source/Project64-core/N64System/Recompiler/Arm/ArmRecompilerOps.h
index 13a5a3d40..46533d757 100644
--- a/Source/Project64-core/N64System/Recompiler/Arm/ArmRecompilerOps.h
+++ b/Source/Project64-core/N64System/Recompiler/Arm/ArmRecompilerOps.h
@@ -49,6 +49,7 @@ public:
     void DADDIU();
     void LDL();
     void LDR();
+    void RESERVED31();
     void LB();
     void LH();
     void LWL();
diff --git a/Source/Project64-core/N64System/Recompiler/CodeBlock.cpp b/Source/Project64-core/N64System/Recompiler/CodeBlock.cpp
index 827af486f..638d7ce99 100644
--- a/Source/Project64-core/N64System/Recompiler/CodeBlock.cpp
+++ b/Source/Project64-core/N64System/Recompiler/CodeBlock.cpp
@@ -772,6 +772,10 @@ bool CCodeBlock::AnalyzeInstruction(uint32_t PC, uint32_t & TargetPC, uint32_t &
     case R4300i_DADDIU:
     case R4300i_LDL:
     case R4300i_LDR:
+        break;
+    case R4300i_RESERVED31:
+        EndBlock = true;
+        break;
     case R4300i_LB:
     case R4300i_LH:
     case R4300i_LWL:
diff --git a/Source/Project64-core/N64System/Recompiler/CodeSection.cpp b/Source/Project64-core/N64System/Recompiler/CodeSection.cpp
index f97b8dec6..6a12928fa 100644
--- a/Source/Project64-core/N64System/Recompiler/CodeSection.cpp
+++ b/Source/Project64-core/N64System/Recompiler/CodeSection.cpp
@@ -646,6 +646,7 @@ bool CCodeSection::GenerateNativeCode(uint32_t Test)
         case R4300i_DADDIU: m_RecompilerOps->DADDIU(); break;
         case R4300i_LDL: m_RecompilerOps->LDL(); break;
         case R4300i_LDR: m_RecompilerOps->LDR(); break;
+        case R4300i_RESERVED31: m_RecompilerOps->RESERVED31(); break;
         case R4300i_LB: m_RecompilerOps->LB(); break;
         case R4300i_LH: m_RecompilerOps->LH(); break;
         case R4300i_LWL: m_RecompilerOps->LWL(); break;
diff --git a/Source/Project64-core/N64System/Recompiler/ExitInfo.h b/Source/Project64-core/N64System/Recompiler/ExitInfo.h
index 0b17cdec2..dbeafb788 100644
--- a/Source/Project64-core/N64System/Recompiler/ExitInfo.h
+++ b/Source/Project64-core/N64System/Recompiler/ExitInfo.h
@@ -19,6 +19,7 @@ enum ExitReason
     ExitReason_ExceptionOverflow,
     ExitReason_AddressErrorExceptionRead32,
     ExitReason_AddressErrorExceptionRead64,
+    ExitReason_IllegalInstruction,
 };
 
 struct CExitInfo
diff --git a/Source/Project64-core/N64System/Recompiler/x64-86/x64RecompilerOps.cpp b/Source/Project64-core/N64System/Recompiler/x64-86/x64RecompilerOps.cpp
index e77345c8d..6013b9750 100644
--- a/Source/Project64-core/N64System/Recompiler/x64-86/x64RecompilerOps.cpp
+++ b/Source/Project64-core/N64System/Recompiler/x64-86/x64RecompilerOps.cpp
@@ -143,6 +143,11 @@ void CX64RecompilerOps::LDR()
     g_Notify->BreakPoint(__FILE__, __LINE__);
 }
 
+void CX64RecompilerOps::RESERVED31()
+{
+    g_Notify->BreakPoint(__FILE__, __LINE__);
+}
+
 void CX64RecompilerOps::LB()
 {
     g_Notify->BreakPoint(__FILE__, __LINE__);
diff --git a/Source/Project64-core/N64System/Recompiler/x64-86/x64RecompilerOps.h b/Source/Project64-core/N64System/Recompiler/x64-86/x64RecompilerOps.h
index bc3821714..bc1758a09 100644
--- a/Source/Project64-core/N64System/Recompiler/x64-86/x64RecompilerOps.h
+++ b/Source/Project64-core/N64System/Recompiler/x64-86/x64RecompilerOps.h
@@ -50,6 +50,7 @@ public:
     void DADDIU();
     void LDL();
     void LDR();
+    void RESERVED31();
     void LB();
     void LH();
     void LWL();
diff --git a/Source/Project64-core/N64System/Recompiler/x86/x86RecompilerOps.cpp b/Source/Project64-core/N64System/Recompiler/x86/x86RecompilerOps.cpp
index b75b841a1..3077e5097 100644
--- a/Source/Project64-core/N64System/Recompiler/x86/x86RecompilerOps.cpp
+++ b/Source/Project64-core/N64System/Recompiler/x86/x86RecompilerOps.cpp
@@ -3036,6 +3036,13 @@ void CX86RecompilerOps::LH_KnownAddress(CX86Ops::x86Reg Reg, uint32_t VAddr, boo
     }
 }
 
+void CX86RecompilerOps::RESERVED31()
+{
+    m_RegWorkingSet.SetBlockCycleCount(m_RegWorkingSet.GetBlockCycleCount() + g_System->CountPerOp());
+    CompileExit(m_CompilePC, m_CompilePC, m_RegWorkingSet, ExitReason_IllegalInstruction, true, nullptr);
+    m_PipelineStage = PIPELINE_STAGE_END_BLOCK;
+}
+
 void CX86RecompilerOps::LB()
 {
     if (m_Opcode.rt == 0)
@@ -4499,7 +4506,7 @@ void CX86RecompilerOps::SPECIAL_JALR()
 void CX86RecompilerOps::SPECIAL_SYSCALL()
 {
     m_RegWorkingSet.SetBlockCycleCount(m_RegWorkingSet.GetBlockCycleCount() + g_System->CountPerOp());
-    CompileExit(m_CompilePC, (uint32_t)-1, m_RegWorkingSet, ExitReason_DoSysCall, true, nullptr);
+    CompileExit(m_CompilePC, m_CompilePC, m_RegWorkingSet, ExitReason_DoSysCall, true, nullptr);
     m_PipelineStage = PIPELINE_STAGE_END_BLOCK;
 }
 
@@ -9636,6 +9643,11 @@ void CX86RecompilerOps::CompileExit(uint32_t JumpPC, uint32_t TargetPC, CRegInfo
         m_Assembler.CallThis((uint32_t)g_Reg, AddressOf(&CRegisters::DoAddressError), "CRegisters::DoAddressError", 12);
         ExitCodeBlock();
         break;
+    case ExitReason_IllegalInstruction:
+        m_Assembler.PushImm32(InDelaySlot ? "true" : "false", InDelaySlot);
+        m_Assembler.CallThis((uint32_t)g_Reg, AddressOf(&CRegisters::DoIllegalInstructionException), "CRegisters::DoIllegalInstructionException", 8);
+        ExitCodeBlock();
+        break;
     default:
         WriteTrace(TraceRecompiler, TraceError, "How did you want to exit on reason (%d) ???", reason);
         g_Notify->BreakPoint(__FILE__, __LINE__);
diff --git a/Source/Project64-core/N64System/Recompiler/x86/x86RecompilerOps.h b/Source/Project64-core/N64System/Recompiler/x86/x86RecompilerOps.h
index 54c294c8b..39ded28b8 100644
--- a/Source/Project64-core/N64System/Recompiler/x86/x86RecompilerOps.h
+++ b/Source/Project64-core/N64System/Recompiler/x86/x86RecompilerOps.h
@@ -57,6 +57,7 @@ public:
     void DADDIU();
     void LDL();
     void LDR();
+    void RESERVED31();
     void LB();
     void LH();
     void LWL();