diff --git a/riscv-isac/riscv_isac/data/rvopcodesdecoder.py b/riscv-isac/riscv_isac/data/rvopcodesdecoder.py
index eb835920d..10fd50850 100644
--- a/riscv-isac/riscv_isac/data/rvopcodesdecoder.py
+++ b/riscv-isac/riscv_isac/data/rvopcodesdecoder.py
@@ -400,7 +400,7 @@ def decode(self, instrObj_temp):
                     if any([instr_name.startswith(x) for x in [
                             'fsh', 'fsw','fsd','fcvt.s','fcvt.d','fmv.w','fmv.l','fcvt.h','fmv.h','flh','fclass','fsqrt','fmax','fmin','fadd','fsub','feq','fle','flt','fmul','fdiv','fsgnj','fsgnjn','fsgnjx']]):
                         treg = 'x'
-                    temp_instrobj.rs2 = (int(get_arg_val(arg)(mcode), 2), treg
+                    temp_instrobj.rs2 = (int(get_arg_val(arg)(mcode), 2), treg)
                     if 'p' in arg:
                         temp_instrobj.rd = (8+int(get_arg_val(arg)(mcode), 2), treg)
                     else: