diff --git a/package/ctypes/ctypes.py b/package/ctypes/ctypes.py
index 2a9ba54ce..4d25e7e3d 100644
--- a/package/ctypes/ctypes.py
+++ b/package/ctypes/ctypes.py
@@ -32,4 +32,4 @@ class c_longdouble(c_float):...
 
 class Test(TinyObj):
     def add(self, c_uint1:c_uint, c_uint2:c_uint)->int:...
-    def dc_cpuapdu_hex(self, slen:int, sendbuf:str, rlen:c_uint, rcvbuf:c_wchar_p) -> int:...
+    def dc_cpuapdu_hex(self, slen:int, sendbuf:str, rlen:c_uint, rcvbuf:c_char_p) -> int:...