diff --git a/src/main/java/net/runelite/deob/attributes/code/instruction/types/DupInstruction.java b/src/main/java/net/runelite/deob/attributes/code/instruction/types/DupInstruction.java
new file mode 100644
index 0000000000..6df5249512
--- /dev/null
+++ b/src/main/java/net/runelite/deob/attributes/code/instruction/types/DupInstruction.java
@@ -0,0 +1,6 @@
+package net.runelite.deob.attributes.code.instruction.types;
+
+public interface DupInstruction
+{
+
+}
diff --git a/src/main/java/net/runelite/deob/attributes/code/instructions/Dup.java b/src/main/java/net/runelite/deob/attributes/code/instructions/Dup.java
index 5c1743fae3..853f7ba849 100644
--- a/src/main/java/net/runelite/deob/attributes/code/instructions/Dup.java
+++ b/src/main/java/net/runelite/deob/attributes/code/instructions/Dup.java
@@ -1,5 +1,6 @@
 package net.runelite.deob.attributes.code.instructions;
 
+import java.io.IOException;
 import net.runelite.deob.attributes.code.Instruction;
 import net.runelite.deob.attributes.code.InstructionType;
 import net.runelite.deob.attributes.code.Instructions;
@@ -7,10 +8,9 @@ import net.runelite.deob.execution.Frame;
 import net.runelite.deob.execution.InstructionContext;
 import net.runelite.deob.execution.Stack;
 import net.runelite.deob.execution.StackContext;
+import net.runelite.deob.attributes.code.instruction.types.DupInstruction;
 
-import java.io.IOException;
-
-public class Dup extends Instruction
+public class Dup extends Instruction implements DupInstruction
 {
 	public Dup(Instructions instructions, InstructionType type, int pc) throws IOException
 	{
@@ -27,11 +27,13 @@ public class Dup extends Instruction
 		ins.pop(obj);
 		
 		StackContext ctx = new StackContext(ins, obj.getType());
+		ctx.encryption = obj.encryption;
 		stack.push(ctx);
 		
 		ins.push(ctx);
 		
 		ctx = new StackContext(ins, obj.getType());
+		ctx.encryption = obj.encryption;
 		stack.push(ctx);
 		
 		ins.push(ctx);
diff --git a/src/main/java/net/runelite/deob/attributes/code/instructions/Dup2.java b/src/main/java/net/runelite/deob/attributes/code/instructions/Dup2.java
index 7a0698ed8a..3f4e7578de 100644
--- a/src/main/java/net/runelite/deob/attributes/code/instructions/Dup2.java
+++ b/src/main/java/net/runelite/deob/attributes/code/instructions/Dup2.java
@@ -1,5 +1,6 @@
 package net.runelite.deob.attributes.code.instructions;
 
+import java.io.IOException;
 import net.runelite.deob.attributes.code.Instruction;
 import net.runelite.deob.attributes.code.InstructionType;
 import net.runelite.deob.attributes.code.Instructions;
@@ -8,10 +9,9 @@ import net.runelite.deob.execution.InstructionContext;
 import net.runelite.deob.execution.Stack;
 import net.runelite.deob.execution.StackContext;
 import net.runelite.deob.execution.Type;
+import net.runelite.deob.attributes.code.instruction.types.DupInstruction;
 
-import java.io.IOException;
-
-public class Dup2 extends Instruction
+public class Dup2 extends Instruction implements DupInstruction
 {
 	public Dup2(Instructions instructions, InstructionType type, int pc) throws IOException
 	{
@@ -36,12 +36,14 @@ public class Dup2 extends Instruction
 		if (two != null)
 		{
 			StackContext ctx = new StackContext(ins, two.getType());
+			ctx.encryption = two.encryption;
 			stack.push(ctx);
 			
 			ins.push(ctx);
 		}
 		
 		StackContext ctx = new StackContext(ins, one.getType());
+		ctx.encryption = one.encryption;
 		stack.push(one);
 		
 		ins.push(ctx);
@@ -49,12 +51,14 @@ public class Dup2 extends Instruction
 		if (two != null)
 		{
 			ctx = new StackContext(ins, two.getType());
+			ctx.encryption = two.encryption;
 			stack.push(ctx);
 			
 			ins.push(ctx);
 		}
 		
 		ctx = new StackContext(ins, one.getType());
+		ctx.encryption = one.encryption;
 		stack.push(one);
 		
 		ins.push(ctx);
diff --git a/src/main/java/net/runelite/deob/attributes/code/instructions/Dup2_X1.java b/src/main/java/net/runelite/deob/attributes/code/instructions/Dup2_X1.java
index b7dbfaacf9..ea1da1d658 100644
--- a/src/main/java/net/runelite/deob/attributes/code/instructions/Dup2_X1.java
+++ b/src/main/java/net/runelite/deob/attributes/code/instructions/Dup2_X1.java
@@ -1,5 +1,6 @@
 package net.runelite.deob.attributes.code.instructions;
 
+import java.io.IOException;
 import net.runelite.deob.attributes.code.Instruction;
 import net.runelite.deob.attributes.code.InstructionType;
 import net.runelite.deob.attributes.code.Instructions;
@@ -8,10 +9,9 @@ import net.runelite.deob.execution.InstructionContext;
 import net.runelite.deob.execution.Stack;
 import net.runelite.deob.execution.StackContext;
 import net.runelite.deob.execution.Type;
+import net.runelite.deob.attributes.code.instruction.types.DupInstruction;
 
-import java.io.IOException;
-
-public class Dup2_X1 extends Instruction
+public class Dup2_X1 extends Instruction implements DupInstruction
 {
 	public Dup2_X1(Instructions instructions, InstructionType type, int pc) throws IOException
 	{
@@ -38,17 +38,20 @@ public class Dup2_X1 extends Instruction
 		if (two != null)
 		{
 			StackContext ctx = new StackContext(ins, two.getType());
+			ctx.encryption = two.encryption;
 			stack.push(ctx);
 			
 			ins.push(ctx);
 		}
 		
 		StackContext ctx = new StackContext(ins, one.getType());
+		ctx.encryption = one.encryption;
 		stack.push(ctx);
 		
 		ins.push(ctx);
 		
 		ctx = new StackContext(ins, three.getType());
+		ctx.encryption = three.encryption;
 		stack.push(ctx);
 		
 		ins.push(ctx);
@@ -56,12 +59,14 @@ public class Dup2_X1 extends Instruction
 		if (two != null)
 		{
 			ctx = new StackContext(ins, two.getType());
+			ctx.encryption = two.encryption;
 			stack.push(ctx);
 			
 			ins.push(ctx);
 		}
 		
 		ctx = new StackContext(ins, one.getType());
+		ctx.encryption = one.encryption;
 		stack.push(ctx);
 		
 		ins.push(ctx);
diff --git a/src/main/java/net/runelite/deob/attributes/code/instructions/Dup2_X2.java b/src/main/java/net/runelite/deob/attributes/code/instructions/Dup2_X2.java
index 367e86885f..60553bd5f9 100644
--- a/src/main/java/net/runelite/deob/attributes/code/instructions/Dup2_X2.java
+++ b/src/main/java/net/runelite/deob/attributes/code/instructions/Dup2_X2.java
@@ -1,5 +1,6 @@
 package net.runelite.deob.attributes.code.instructions;
 
+import java.io.IOException;
 import net.runelite.deob.attributes.code.Instruction;
 import net.runelite.deob.attributes.code.InstructionType;
 import net.runelite.deob.attributes.code.Instructions;
@@ -8,10 +9,9 @@ import net.runelite.deob.execution.InstructionContext;
 import net.runelite.deob.execution.Stack;
 import net.runelite.deob.execution.StackContext;
 import net.runelite.deob.execution.Type;
+import net.runelite.deob.attributes.code.instruction.types.DupInstruction;
 
-import java.io.IOException;
-
-public class Dup2_X2 extends Instruction
+public class Dup2_X2 extends Instruction implements DupInstruction
 {
 	public Dup2_X2(Instructions instructions, InstructionType type, int pc) throws IOException
 	{
@@ -43,12 +43,14 @@ public class Dup2_X2 extends Instruction
 		if (two != null)
 		{
 			StackContext ctx = new StackContext(ins, two.getType());
+			ctx.encryption = two.encryption;
 			stack.push(ctx);
 			
 			ins.push(ctx);
 		}
 		
 		StackContext ctx = new StackContext(ins, one.getType());
+		ctx.encryption = one.encryption;
 		stack.push(one);
 		
 		ins.push(ctx);
@@ -56,12 +58,14 @@ public class Dup2_X2 extends Instruction
 		if (four != null)
 		{
 			ctx = new StackContext(ins, four.getType());
+			ctx.encryption = four.encryption;
 			stack.push(ctx);
 			
 			ins.push(ctx);
 		}
 		
 		ctx = new StackContext(ins, three.getType());
+		ctx.encryption = three.encryption;
 		stack.push(one);
 		
 		ins.push(ctx);
@@ -69,12 +73,14 @@ public class Dup2_X2 extends Instruction
 		if (two != null)
 		{
 			ctx = new StackContext(ins, two.getType());
+			ctx.encryption = two.encryption;
 			stack.push(ctx);
 			
 			ins.push(ctx);
 		}
 		
 		ctx = new StackContext(ins, one.getType());
+		ctx.encryption = one.encryption;
 		stack.push(one);
 		
 		ins.push(ctx);
diff --git a/src/main/java/net/runelite/deob/attributes/code/instructions/Dup_X1.java b/src/main/java/net/runelite/deob/attributes/code/instructions/Dup_X1.java
index defb3440de..3ee57b8797 100644
--- a/src/main/java/net/runelite/deob/attributes/code/instructions/Dup_X1.java
+++ b/src/main/java/net/runelite/deob/attributes/code/instructions/Dup_X1.java
@@ -1,5 +1,6 @@
 package net.runelite.deob.attributes.code.instructions;
 
+import java.io.IOException;
 import net.runelite.deob.attributes.code.Instruction;
 import net.runelite.deob.attributes.code.InstructionType;
 import net.runelite.deob.attributes.code.Instructions;
@@ -7,10 +8,9 @@ import net.runelite.deob.execution.Frame;
 import net.runelite.deob.execution.InstructionContext;
 import net.runelite.deob.execution.Stack;
 import net.runelite.deob.execution.StackContext;
+import net.runelite.deob.attributes.code.instruction.types.DupInstruction;
 
-import java.io.IOException;
-
-public class Dup_X1 extends Instruction
+public class Dup_X1 extends Instruction implements DupInstruction
 {
 	public Dup_X1(Instructions instructions, InstructionType type, int pc) throws IOException
 	{
diff --git a/src/main/java/net/runelite/deob/attributes/code/instructions/Dup_X2.java b/src/main/java/net/runelite/deob/attributes/code/instructions/Dup_X2.java
index 55412a94a2..5df005d458 100644
--- a/src/main/java/net/runelite/deob/attributes/code/instructions/Dup_X2.java
+++ b/src/main/java/net/runelite/deob/attributes/code/instructions/Dup_X2.java
@@ -1,5 +1,6 @@
 package net.runelite.deob.attributes.code.instructions;
 
+import java.io.IOException;
 import net.runelite.deob.attributes.code.Instruction;
 import net.runelite.deob.attributes.code.InstructionType;
 import net.runelite.deob.attributes.code.Instructions;
@@ -8,10 +9,9 @@ import net.runelite.deob.execution.InstructionContext;
 import net.runelite.deob.execution.Stack;
 import net.runelite.deob.execution.StackContext;
 import net.runelite.deob.execution.Type;
+import net.runelite.deob.attributes.code.instruction.types.DupInstruction;
 
-import java.io.IOException;
-
-public class Dup_X2 extends Instruction
+public class Dup_X2 extends Instruction implements DupInstruction
 {
 	public Dup_X2(Instructions instructions, InstructionType type, int pc) throws IOException
 	{
@@ -35,6 +35,7 @@ public class Dup_X2 extends Instruction
 			ins.pop(three);
 		
 		StackContext ctx = new StackContext(ins, one.getType());
+		ctx.encryption = one.encryption;
 		stack.push(ctx);
 		
 		ins.push(ctx);
@@ -42,17 +43,20 @@ public class Dup_X2 extends Instruction
 		if (three != null)
 		{
 			ctx = new StackContext(ins, three.getType());
+			ctx.encryption = three.encryption;
 			stack.push(ctx);
 			
 			ins.push(ctx);
 		}
 		
 		ctx = new StackContext(ins, two.getType());
+		ctx.encryption = two.encryption;
 		stack.push(ctx);
 		
 		ins.push(ctx);
 		
 		ctx = new StackContext(ins, one.getType());
+		ctx.encryption = one.encryption;
 		stack.push(ctx);
 		
 		ins.push(ctx);