diff --git a/ARMeilleure/CodeGen/Optimizations/ConstantFolding.cs b/ARMeilleure/CodeGen/Optimizations/ConstantFolding.cs
index 359af113..19cc009c 100644
--- a/ARMeilleure/CodeGen/Optimizations/ConstantFolding.cs
+++ b/ARMeilleure/CodeGen/Optimizations/ConstantFolding.cs
@@ -206,6 +206,39 @@ namespace ARMeilleure.CodeGen.Optimizations
                     }
                     break;
 
+                case Instruction.ZeroExtend16:
+                    if (type == OperandType.I32)
+                    {
+                        EvaluateUnaryI32(operation, (x) => (ushort)x);
+                    }
+                    else if (type == OperandType.I64)
+                    {
+                        EvaluateUnaryI64(operation, (x) => (ushort)x);
+                    }
+                    break;
+
+                case Instruction.ZeroExtend32:
+                    if (type == OperandType.I32)
+                    {
+                        EvaluateUnaryI32(operation, (x) => x);
+                    }
+                    else if (type == OperandType.I64)
+                    {
+                        EvaluateUnaryI64(operation, (x) => (uint)x);
+                    }
+                    break;
+
+                case Instruction.ZeroExtend8:
+                    if (type == OperandType.I32)
+                    {
+                        EvaluateUnaryI32(operation, (x) => (byte)x);
+                    }
+                    else if (type == OperandType.I64)
+                    {
+                        EvaluateUnaryI64(operation, (x) => (byte)x);
+                    }
+                    break;
+
                 case Instruction.Subtract:
                     if (type == OperandType.I32)
                     {
diff --git a/ARMeilleure/Translation/PTC/Ptc.cs b/ARMeilleure/Translation/PTC/Ptc.cs
index 2742719d..ced3d0d4 100644
--- a/ARMeilleure/Translation/PTC/Ptc.cs
+++ b/ARMeilleure/Translation/PTC/Ptc.cs
@@ -20,7 +20,7 @@ namespace ARMeilleure.Translation.PTC
     {
         private const string HeaderMagic = "PTChd";
 
-        private const int InternalVersion = 4; //! To be incremented manually for each change to the ARMeilleure project.
+        private const int InternalVersion = 5; //! To be incremented manually for each change to the ARMeilleure project.
 
         private const string BaseDir = "Ryujinx";