diff --git a/sark/code/instruction.py b/sark/code/instruction.py
index <HASH>..<HASH> 100644
--- a/sark/code/instruction.py
+++ b/sark/code/instruction.py
@@ -100,4 +100,4 @@ class Instruction(object):
 
     @property
     def regs(self):
-        return [operand.reg for operand in self.operands]
\ No newline at end of file
+        return set(operand.reg for operand in self.operands)
\ No newline at end of file
Removed repetitions in `Instruction.regs`.