diff --git a/insns/Insn.py b/insns/Insn.py
index 72dc7a0..b3fbc3e 100644
--- a/insns/Insn.py
+++ b/insns/Insn.py
@@ -6,12 +6,11 @@ Class for generic RISC-V instructions
 """
 
 class Insn(Elaboratable):
-    def __init__(self, RISCV_FORMAL_ILEN, RISCV_FORMAL_XLEN, RISCV_FORMAL_CSR_MISA, RISCV_FORMAL_COMPRESSED):
+    def __init__(self, RISCV_FORMAL_ILEN, RISCV_FORMAL_XLEN, RISCV_FORMAL_CSR_MISA):
         # Core-specific constants
         self.RISCV_FORMAL_ILEN = RISCV_FORMAL_ILEN
         self.RISCV_FORMAL_XLEN = RISCV_FORMAL_XLEN
         self.RISCV_FORMAL_CSR_MISA = RISCV_FORMAL_CSR_MISA
-        self.RISCV_FORMAL_COMPRESSED = RISCV_FORMAL_COMPRESSED
 
         # RVFI input ports
         self.rvfi_valid = Signal(1)