diff --git a/scripts/libc_function_args/tables/generator.py b/scripts/libc_function_args/tables/generator.py
index aac2dfc..07b96dd 100644
--- a/scripts/libc_function_args/tables/generator.py
+++ b/scripts/libc_function_args/tables/generator.py
@@ -118,7 +118,7 @@ def generate_all_json_files() -> bool:
         # generate x86_64
         if libc_x64_funcdef_fpath in libc_funcdef_list and not generate_json_file(
             function_dict,
-            ["$rdi", "$rsi", "$rdx", "$r10", "$r8", "$r9"],
+            ["$rdi", "$rsi", "$rdx", "$rcx", "$r8", "$r9"],
             libc_x64_funcdef_fpath,
         ):
             logging.error(