diff --git a/rvv-intrinsic-generator/rvv_intrinsic_gen/templates/misc_op_template.py b/rvv-intrinsic-generator/rvv_intrinsic_gen/templates/misc_op_template.py
index 95b9a29ec..43b757b79 100644
--- a/rvv-intrinsic-generator/rvv_intrinsic_gen/templates/misc_op_template.py
+++ b/rvv-intrinsic-generator/rvv_intrinsic_gen/templates/misc_op_template.py
@@ -40,6 +40,7 @@ def render(G, op_list, type_list, sew_list, lmul_list, decorator_list):
       break
     decorator.write_text_header(G)
 
+    inst_type = None
     for args in prod(OP=op_list, TYPE=type_list, SEW=sew_list, LMUL=lmul_list):
       type_helper = TypeHelper(**args)
       if args["OP"] not in ["vundefined"]: